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authorDavid Daney <ddaney@caviumnetworks.com>2009-01-08 16:46:40 -0800
committerRalf Baechle <ralf@linux-mips.org>2009-01-11 09:57:21 +0000
commit5b3b16880f404ca54126210ca86141cceeafc0cf (patch)
treef69d30450a923782534d4ae257f20aace0a0be74 /arch/mips/cavium-octeon
parent58f07778ce9d32c22cecb1d8ef348001f0e705c9 (diff)
download96b-common-5b3b16880f404ca54126210ca86141cceeafc0cf.tar.gz
MIPS: Add Cavium OCTEON processor support files to arch/mips/cavium-octeon.
These are the rest of the new files needed to add OCTEON processor support to the Linux kernel. Other than Makefile and Kconfig which should be obvious, we have: csrc-octeon.c -- Clock source driver for OCTEON. dma-octeon.c -- Helper functions for mapping DMA memory. flash_setup.c -- Register on-board flash with the MTD subsystem. octeon-irq.c -- OCTEON interrupt controller managment. octeon-memcpy.S -- Optimized memcpy() implementation. serial.c -- Register 8250 platform driver and early console. setup.c -- Early architecture initialization. smp.c -- OCTEON SMP support. octeon_switch.S -- Scheduler context switch for OCTEON. c-octeon.c -- OCTEON cache controller support. cex-oct.S -- OCTEON cache exception handler. asm/mach-cavium-octeon/*.h -- Architecture include files. Signed-off-by: Tomaso Paoletti <tpaoletti@caviumnetworks.com> Signed-off-by: David Daney <ddaney@caviumnetworks.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org> create mode 100644 arch/mips/cavium-octeon/Kconfig create mode 100644 arch/mips/cavium-octeon/Makefile create mode 100644 arch/mips/cavium-octeon/csrc-octeon.c create mode 100644 arch/mips/cavium-octeon/dma-octeon.c create mode 100644 arch/mips/cavium-octeon/flash_setup.c create mode 100644 arch/mips/cavium-octeon/octeon-irq.c create mode 100644 arch/mips/cavium-octeon/octeon-memcpy.S create mode 100644 arch/mips/cavium-octeon/serial.c create mode 100644 arch/mips/cavium-octeon/setup.c create mode 100644 arch/mips/cavium-octeon/smp.c create mode 100644 arch/mips/include/asm/mach-cavium-octeon/cpu-feature-overrides.h create mode 100644 arch/mips/include/asm/mach-cavium-octeon/dma-coherence.h create mode 100644 arch/mips/include/asm/mach-cavium-octeon/irq.h create mode 100644 arch/mips/include/asm/mach-cavium-octeon/kernel-entry-init.h create mode 100644 arch/mips/include/asm/mach-cavium-octeon/war.h create mode 100644 arch/mips/include/asm/octeon/octeon.h create mode 100644 arch/mips/kernel/octeon_switch.S create mode 100644 arch/mips/mm/c-octeon.c create mode 100644 arch/mips/mm/cex-oct.S
Diffstat (limited to 'arch/mips/cavium-octeon')
-rw-r--r--arch/mips/cavium-octeon/Kconfig85
-rw-r--r--arch/mips/cavium-octeon/Makefile16
-rw-r--r--arch/mips/cavium-octeon/csrc-octeon.c58
-rw-r--r--arch/mips/cavium-octeon/dma-octeon.c32
-rw-r--r--arch/mips/cavium-octeon/flash_setup.c84
-rw-r--r--arch/mips/cavium-octeon/octeon-irq.c497
-rw-r--r--arch/mips/cavium-octeon/octeon-memcpy.S521
-rw-r--r--arch/mips/cavium-octeon/serial.c136
-rw-r--r--arch/mips/cavium-octeon/setup.c929
-rw-r--r--arch/mips/cavium-octeon/smp.c211
10 files changed, 2569 insertions, 0 deletions
diff --git a/arch/mips/cavium-octeon/Kconfig b/arch/mips/cavium-octeon/Kconfig
new file mode 100644
index 000000000000..094c17e38e16
--- /dev/null
+++ b/arch/mips/cavium-octeon/Kconfig
@@ -0,0 +1,85 @@
+config CAVIUM_OCTEON_SPECIFIC_OPTIONS
+ bool "Enable Octeon specific options"
+ depends on CPU_CAVIUM_OCTEON
+ default "y"
+
+config CAVIUM_OCTEON_2ND_KERNEL
+ bool "Build the kernel to be used as a 2nd kernel on the same chip"
+ depends on CAVIUM_OCTEON_SPECIFIC_OPTIONS
+ default "n"
+ help
+ This option configures this kernel to be linked at a different
+ address and use the 2nd uart for output. This allows a kernel built
+ with this option to be run at the same time as one built without this
+ option.
+
+config CAVIUM_OCTEON_HW_FIX_UNALIGNED
+ bool "Enable hardware fixups of unaligned loads and stores"
+ depends on CAVIUM_OCTEON_SPECIFIC_OPTIONS
+ default "y"
+ help
+ Configure the Octeon hardware to automatically fix unaligned loads
+ and stores. Normally unaligned accesses are fixed using a kernel
+ exception handler. This option enables the hardware automatic fixups,
+ which requires only an extra 3 cycles. Disable this option if you
+ are running code that relies on address exceptions on unaligned
+ accesses.
+
+config CAVIUM_OCTEON_CVMSEG_SIZE
+ int "Number of L1 cache lines reserved for CVMSEG memory"
+ depends on CAVIUM_OCTEON_SPECIFIC_OPTIONS
+ range 0 54
+ default 1
+ help
+ CVMSEG LM is a segment that accesses portions of the dcache as a
+ local memory; the larger CVMSEG is, the smaller the cache is.
+ This selects the size of CVMSEG LM, which is in cache blocks. The
+ legally range is from zero to 54 cache blocks (i.e. CVMSEG LM is
+ between zero and 6192 bytes).
+
+config CAVIUM_OCTEON_LOCK_L2
+ bool "Lock often used kernel code in the L2"
+ depends on CAVIUM_OCTEON_SPECIFIC_OPTIONS
+ default "y"
+ help
+ Enable locking parts of the kernel into the L2 cache.
+
+config CAVIUM_OCTEON_LOCK_L2_TLB
+ bool "Lock the TLB handler in L2"
+ depends on CAVIUM_OCTEON_LOCK_L2
+ default "y"
+ help
+ Lock the low level TLB fast path into L2.
+
+config CAVIUM_OCTEON_LOCK_L2_EXCEPTION
+ bool "Lock the exception handler in L2"
+ depends on CAVIUM_OCTEON_LOCK_L2
+ default "y"
+ help
+ Lock the low level exception handler into L2.
+
+config CAVIUM_OCTEON_LOCK_L2_LOW_LEVEL_INTERRUPT
+ bool "Lock the interrupt handler in L2"
+ depends on CAVIUM_OCTEON_LOCK_L2
+ default "y"
+ help
+ Lock the low level interrupt handler into L2.
+
+config CAVIUM_OCTEON_LOCK_L2_INTERRUPT
+ bool "Lock the 2nd level interrupt handler in L2"
+ depends on CAVIUM_OCTEON_LOCK_L2
+ default "y"
+ help
+ Lock the 2nd level interrupt handler in L2.
+
+config CAVIUM_OCTEON_LOCK_L2_MEMCPY
+ bool "Lock memcpy() in L2"
+ depends on CAVIUM_OCTEON_LOCK_L2
+ default "y"
+ help
+ Lock the kernel's implementation of memcpy() into L2.
+
+config ARCH_SPARSEMEM_ENABLE
+ def_bool y
+ select SPARSEMEM_STATIC
+ depends on CPU_CAVIUM_OCTEON
diff --git a/arch/mips/cavium-octeon/Makefile b/arch/mips/cavium-octeon/Makefile
new file mode 100644
index 000000000000..1c2a7faf5881
--- /dev/null
+++ b/arch/mips/cavium-octeon/Makefile
@@ -0,0 +1,16 @@
+#
+# Makefile for the Cavium Octeon specific kernel interface routines
+# under Linux.
+#
+# This file is subject to the terms and conditions of the GNU General Public
+# License. See the file "COPYING" in the main directory of this archive
+# for more details.
+#
+# Copyright (C) 2005-2008 Cavium Networks
+#
+
+obj-y := setup.o serial.o octeon-irq.o csrc-octeon.o
+obj-y += dma-octeon.o flash_setup.o
+obj-y += octeon-memcpy.o
+
+obj-$(CONFIG_SMP) += smp.o
diff --git a/arch/mips/cavium-octeon/csrc-octeon.c b/arch/mips/cavium-octeon/csrc-octeon.c
new file mode 100644
index 000000000000..70fd92c31657
--- /dev/null
+++ b/arch/mips/cavium-octeon/csrc-octeon.c
@@ -0,0 +1,58 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2007 by Ralf Baechle
+ */
+#include <linux/clocksource.h>
+#include <linux/init.h>
+
+#include <asm/time.h>
+
+#include <asm/octeon/octeon.h>
+#include <asm/octeon/cvmx-ipd-defs.h>
+
+/*
+ * Set the current core's cvmcount counter to the value of the
+ * IPD_CLK_COUNT. We do this on all cores as they are brought
+ * on-line. This allows for a read from a local cpu register to
+ * access a synchronized counter.
+ *
+ */
+void octeon_init_cvmcount(void)
+{
+ unsigned long flags;
+ unsigned loops = 2;
+
+ /* Clobber loops so GCC will not unroll the following while loop. */
+ asm("" : "+r" (loops));
+
+ local_irq_save(flags);
+ /*
+ * Loop several times so we are executing from the cache,
+ * which should give more deterministic timing.
+ */
+ while (loops--)
+ write_c0_cvmcount(cvmx_read_csr(CVMX_IPD_CLK_COUNT));
+ local_irq_restore(flags);
+}
+
+static cycle_t octeon_cvmcount_read(void)
+{
+ return read_c0_cvmcount();
+}
+
+static struct clocksource clocksource_mips = {
+ .name = "OCTEON_CVMCOUNT",
+ .read = octeon_cvmcount_read,
+ .mask = CLOCKSOURCE_MASK(64),
+ .flags = CLOCK_SOURCE_IS_CONTINUOUS,
+};
+
+void __init plat_time_init(void)
+{
+ clocksource_mips.rating = 300;
+ clocksource_set_clock(&clocksource_mips, mips_hpt_frequency);
+ clocksource_register(&clocksource_mips);
+}
diff --git a/arch/mips/cavium-octeon/dma-octeon.c b/arch/mips/cavium-octeon/dma-octeon.c
new file mode 100644
index 000000000000..01b1ef94b361
--- /dev/null
+++ b/arch/mips/cavium-octeon/dma-octeon.c
@@ -0,0 +1,32 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2000 Ani Joshi <ajoshi@unixbox.com>
+ * Copyright (C) 2000, 2001 Ralf Baechle <ralf@gnu.org>
+ * Copyright (C) 2005 Ilya A. Volynets-Evenbakh <ilya@total-knowledge.com>
+ * swiped from i386, and cloned for MIPS by Geert, polished by Ralf.
+ * IP32 changes by Ilya.
+ * Cavium Networks: Create new dma setup for Cavium Networks Octeon based on
+ * the kernels original.
+ */
+#include <linux/types.h>
+#include <linux/mm.h>
+
+#include <dma-coherence.h>
+
+dma_addr_t octeon_map_dma_mem(struct device *dev, void *ptr, size_t size)
+{
+ /* Without PCI/PCIe this function can be called for Octeon internal
+ devices such as USB. These devices all support 64bit addressing */
+ mb();
+ return virt_to_phys(ptr);
+}
+
+void octeon_unmap_dma_mem(struct device *dev, dma_addr_t dma_addr)
+{
+ /* Without PCI/PCIe this function can be called for Octeon internal
+ * devices such as USB. These devices all support 64bit addressing */
+ return;
+}
diff --git a/arch/mips/cavium-octeon/flash_setup.c b/arch/mips/cavium-octeon/flash_setup.c
new file mode 100644
index 000000000000..553d36cbcc42
--- /dev/null
+++ b/arch/mips/cavium-octeon/flash_setup.c
@@ -0,0 +1,84 @@
+/*
+ * Octeon Bootbus flash setup
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2007, 2008 Cavium Networks
+ */
+#include <linux/kernel.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/partitions.h>
+
+#include <asm/octeon/octeon.h>
+
+static struct map_info flash_map;
+static struct mtd_info *mymtd;
+#ifdef CONFIG_MTD_PARTITIONS
+static int nr_parts;
+static struct mtd_partition *parts;
+static const char *part_probe_types[] = {
+ "cmdlinepart",
+#ifdef CONFIG_MTD_REDBOOT_PARTS
+ "RedBoot",
+#endif
+ NULL
+};
+#endif
+
+/**
+ * Module/ driver initialization.
+ *
+ * Returns Zero on success
+ */
+static int __init flash_init(void)
+{
+ /*
+ * Read the bootbus region 0 setup to determine the base
+ * address of the flash.
+ */
+ union cvmx_mio_boot_reg_cfgx region_cfg;
+ region_cfg.u64 = cvmx_read_csr(CVMX_MIO_BOOT_REG_CFGX(0));
+ if (region_cfg.s.en) {
+ /*
+ * The bootloader always takes the flash and sets its
+ * address so the entire flash fits below
+ * 0x1fc00000. This way the flash aliases to
+ * 0x1fc00000 for booting. Software can access the
+ * full flash at the true address, while core boot can
+ * access 4MB.
+ */
+ /* Use this name so old part lines work */
+ flash_map.name = "phys_mapped_flash";
+ flash_map.phys = region_cfg.s.base << 16;
+ flash_map.size = 0x1fc00000 - flash_map.phys;
+ flash_map.bankwidth = 1;
+ flash_map.virt = ioremap(flash_map.phys, flash_map.size);
+ pr_notice("Bootbus flash: Setting flash for %luMB flash at "
+ "0x%08lx\n", flash_map.size >> 20, flash_map.phys);
+ simple_map_init(&flash_map);
+ mymtd = do_map_probe("cfi_probe", &flash_map);
+ if (mymtd) {
+ mymtd->owner = THIS_MODULE;
+
+#ifdef CONFIG_MTD_PARTITIONS
+ nr_parts = parse_mtd_partitions(mymtd,
+ part_probe_types,
+ &parts, 0);
+ if (nr_parts > 0)
+ add_mtd_partitions(mymtd, parts, nr_parts);
+ else
+ add_mtd_device(mymtd);
+#else
+ add_mtd_device(mymtd);
+#endif
+ } else {
+ pr_err("Failed to register MTD device for flash\n");
+ }
+ }
+ return 0;
+}
+
+late_initcall(flash_init);
diff --git a/arch/mips/cavium-octeon/octeon-irq.c b/arch/mips/cavium-octeon/octeon-irq.c
new file mode 100644
index 000000000000..fc72984a5dae
--- /dev/null
+++ b/arch/mips/cavium-octeon/octeon-irq.c
@@ -0,0 +1,497 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2004-2008 Cavium Networks
+ */
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <linux/hardirq.h>
+
+#include <asm/octeon/octeon.h>
+
+DEFINE_RWLOCK(octeon_irq_ciu0_rwlock);
+DEFINE_RWLOCK(octeon_irq_ciu1_rwlock);
+DEFINE_SPINLOCK(octeon_irq_msi_lock);
+
+static void octeon_irq_core_ack(unsigned int irq)
+{
+ unsigned int bit = irq - OCTEON_IRQ_SW0;
+ /*
+ * We don't need to disable IRQs to make these atomic since
+ * they are already disabled earlier in the low level
+ * interrupt code.
+ */
+ clear_c0_status(0x100 << bit);
+ /* The two user interrupts must be cleared manually. */
+ if (bit < 2)
+ clear_c0_cause(0x100 << bit);
+}
+
+static void octeon_irq_core_eoi(unsigned int irq)
+{
+ irq_desc_t *desc = irq_desc + irq;
+ unsigned int bit = irq - OCTEON_IRQ_SW0;
+ /*
+ * If an IRQ is being processed while we are disabling it the
+ * handler will attempt to unmask the interrupt after it has
+ * been disabled.
+ */
+ if (desc->status & IRQ_DISABLED)
+ return;
+
+ /* There is a race here. We should fix it. */
+
+ /*
+ * We don't need to disable IRQs to make these atomic since
+ * they are already disabled earlier in the low level
+ * interrupt code.
+ */
+ set_c0_status(0x100 << bit);
+}
+
+static void octeon_irq_core_enable(unsigned int irq)
+{
+ unsigned long flags;
+ unsigned int bit = irq - OCTEON_IRQ_SW0;
+
+ /*
+ * We need to disable interrupts to make sure our updates are
+ * atomic.
+ */
+ local_irq_save(flags);
+ set_c0_status(0x100 << bit);
+ local_irq_restore(flags);
+}
+
+static void octeon_irq_core_disable_local(unsigned int irq)
+{
+ unsigned long flags;
+ unsigned int bit = irq - OCTEON_IRQ_SW0;
+ /*
+ * We need to disable interrupts to make sure our updates are
+ * atomic.
+ */
+ local_irq_save(flags);
+ clear_c0_status(0x100 << bit);
+ local_irq_restore(flags);
+}
+
+static void octeon_irq_core_disable(unsigned int irq)
+{
+#ifdef CONFIG_SMP
+ on_each_cpu((void (*)(void *)) octeon_irq_core_disable_local,
+ (void *) (long) irq, 1);
+#else
+ octeon_irq_core_disable_local(irq);
+#endif
+}
+
+static struct irq_chip octeon_irq_chip_core = {
+ .name = "Core",
+ .enable = octeon_irq_core_enable,
+ .disable = octeon_irq_core_disable,
+ .ack = octeon_irq_core_ack,
+ .eoi = octeon_irq_core_eoi,
+};
+
+
+static void octeon_irq_ciu0_ack(unsigned int irq)
+{
+ /*
+ * In order to avoid any locking accessing the CIU, we
+ * acknowledge CIU interrupts by disabling all of them. This
+ * way we can use a per core register and avoid any out of
+ * core locking requirements. This has the side affect that
+ * CIU interrupts can't be processed recursively.
+ *
+ * We don't need to disable IRQs to make these atomic since
+ * they are already disabled earlier in the low level
+ * interrupt code.
+ */
+ clear_c0_status(0x100 << 2);
+}
+
+static void octeon_irq_ciu0_eoi(unsigned int irq)
+{
+ /*
+ * Enable all CIU interrupts again. We don't need to disable
+ * IRQs to make these atomic since they are already disabled
+ * earlier in the low level interrupt code.
+ */
+ set_c0_status(0x100 << 2);
+}
+
+static void octeon_irq_ciu0_enable(unsigned int irq)
+{
+ int coreid = cvmx_get_core_num();
+ unsigned long flags;
+ uint64_t en0;
+ int bit = irq - OCTEON_IRQ_WORKQ0; /* Bit 0-63 of EN0 */
+
+ /*
+ * A read lock is used here to make sure only one core is ever
+ * updating the CIU enable bits at a time. During an enable
+ * the cores don't interfere with each other. During a disable
+ * the write lock stops any enables that might cause a
+ * problem.
+ */
+ read_lock_irqsave(&octeon_irq_ciu0_rwlock, flags);
+ en0 = cvmx_read_csr(CVMX_CIU_INTX_EN0(coreid * 2));
+ en0 |= 1ull << bit;
+ cvmx_write_csr(CVMX_CIU_INTX_EN0(coreid * 2), en0);
+ cvmx_read_csr(CVMX_CIU_INTX_EN0(coreid * 2));
+ read_unlock_irqrestore(&octeon_irq_ciu0_rwlock, flags);
+}
+
+static void octeon_irq_ciu0_disable(unsigned int irq)
+{
+ int bit = irq - OCTEON_IRQ_WORKQ0; /* Bit 0-63 of EN0 */
+ unsigned long flags;
+ uint64_t en0;
+#ifdef CONFIG_SMP
+ int cpu;
+ write_lock_irqsave(&octeon_irq_ciu0_rwlock, flags);
+ for_each_online_cpu(cpu) {
+ int coreid = cpu_logical_map(cpu);
+ en0 = cvmx_read_csr(CVMX_CIU_INTX_EN0(coreid * 2));
+ en0 &= ~(1ull << bit);
+ cvmx_write_csr(CVMX_CIU_INTX_EN0(coreid * 2), en0);
+ }
+ /*
+ * We need to do a read after the last update to make sure all
+ * of them are done.
+ */
+ cvmx_read_csr(CVMX_CIU_INTX_EN0(cvmx_get_core_num() * 2));
+ write_unlock_irqrestore(&octeon_irq_ciu0_rwlock, flags);
+#else
+ int coreid = cvmx_get_core_num();
+ local_irq_save(flags);
+ en0 = cvmx_read_csr(CVMX_CIU_INTX_EN0(coreid * 2));
+ en0 &= ~(1ull << bit);
+ cvmx_write_csr(CVMX_CIU_INTX_EN0(coreid * 2), en0);
+ cvmx_read_csr(CVMX_CIU_INTX_EN0(coreid * 2));
+ local_irq_restore(flags);
+#endif
+}
+
+#ifdef CONFIG_SMP
+static void octeon_irq_ciu0_set_affinity(unsigned int irq, const struct cpumask *dest)
+{
+ int cpu;
+ int bit = irq - OCTEON_IRQ_WORKQ0; /* Bit 0-63 of EN0 */
+
+ write_lock(&octeon_irq_ciu0_rwlock);
+ for_each_online_cpu(cpu) {
+ int coreid = cpu_logical_map(cpu);
+ uint64_t en0 =
+ cvmx_read_csr(CVMX_CIU_INTX_EN0(coreid * 2));
+ if (cpumask_test_cpu(cpu, dest))
+ en0 |= 1ull << bit;
+ else
+ en0 &= ~(1ull << bit);
+ cvmx_write_csr(CVMX_CIU_INTX_EN0(coreid * 2), en0);
+ }
+ /*
+ * We need to do a read after the last update to make sure all
+ * of them are done.
+ */
+ cvmx_read_csr(CVMX_CIU_INTX_EN0(cvmx_get_core_num() * 2));
+ write_unlock(&octeon_irq_ciu0_rwlock);
+}
+#endif
+
+static struct irq_chip octeon_irq_chip_ciu0 = {
+ .name = "CIU0",
+ .enable = octeon_irq_ciu0_enable,
+ .disable = octeon_irq_ciu0_disable,
+ .ack = octeon_irq_ciu0_ack,
+ .eoi = octeon_irq_ciu0_eoi,
+#ifdef CONFIG_SMP
+ .set_affinity = octeon_irq_ciu0_set_affinity,
+#endif
+};
+
+
+static void octeon_irq_ciu1_ack(unsigned int irq)
+{
+ /*
+ * In order to avoid any locking accessing the CIU, we
+ * acknowledge CIU interrupts by disabling all of them. This
+ * way we can use a per core register and avoid any out of
+ * core locking requirements. This has the side affect that
+ * CIU interrupts can't be processed recursively. We don't
+ * need to disable IRQs to make these atomic since they are
+ * already disabled earlier in the low level interrupt code.
+ */
+ clear_c0_status(0x100 << 3);
+}
+
+static void octeon_irq_ciu1_eoi(unsigned int irq)
+{
+ /*
+ * Enable all CIU interrupts again. We don't need to disable
+ * IRQs to make these atomic since they are already disabled
+ * earlier in the low level interrupt code.
+ */
+ set_c0_status(0x100 << 3);
+}
+
+static void octeon_irq_ciu1_enable(unsigned int irq)
+{
+ int coreid = cvmx_get_core_num();
+ unsigned long flags;
+ uint64_t en1;
+ int bit = irq - OCTEON_IRQ_WDOG0; /* Bit 0-63 of EN1 */
+
+ /*
+ * A read lock is used here to make sure only one core is ever
+ * updating the CIU enable bits at a time. During an enable
+ * the cores don't interfere with each other. During a disable
+ * the write lock stops any enables that might cause a
+ * problem.
+ */
+ read_lock_irqsave(&octeon_irq_ciu1_rwlock, flags);
+ en1 = cvmx_read_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1));
+ en1 |= 1ull << bit;
+ cvmx_write_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1), en1);
+ cvmx_read_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1));
+ read_unlock_irqrestore(&octeon_irq_ciu1_rwlock, flags);
+}
+
+static void octeon_irq_ciu1_disable(unsigned int irq)
+{
+ int bit = irq - OCTEON_IRQ_WDOG0; /* Bit 0-63 of EN1 */
+ unsigned long flags;
+ uint64_t en1;
+#ifdef CONFIG_SMP
+ int cpu;
+ write_lock_irqsave(&octeon_irq_ciu1_rwlock, flags);
+ for_each_online_cpu(cpu) {
+ int coreid = cpu_logical_map(cpu);
+ en1 = cvmx_read_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1));
+ en1 &= ~(1ull << bit);
+ cvmx_write_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1), en1);
+ }
+ /*
+ * We need to do a read after the last update to make sure all
+ * of them are done.
+ */
+ cvmx_read_csr(CVMX_CIU_INTX_EN1(cvmx_get_core_num() * 2 + 1));
+ write_unlock_irqrestore(&octeon_irq_ciu1_rwlock, flags);
+#else
+ int coreid = cvmx_get_core_num();
+ local_irq_save(flags);
+ en1 = cvmx_read_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1));
+ en1 &= ~(1ull << bit);
+ cvmx_write_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1), en1);
+ cvmx_read_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1));
+ local_irq_restore(flags);
+#endif
+}
+
+#ifdef CONFIG_SMP
+static void octeon_irq_ciu1_set_affinity(unsigned int irq, const struct cpumask *dest)
+{
+ int cpu;
+ int bit = irq - OCTEON_IRQ_WDOG0; /* Bit 0-63 of EN1 */
+
+ write_lock(&octeon_irq_ciu1_rwlock);
+ for_each_online_cpu(cpu) {
+ int coreid = cpu_logical_map(cpu);
+ uint64_t en1 =
+ cvmx_read_csr(CVMX_CIU_INTX_EN1
+ (coreid * 2 + 1));
+ if (cpumask_test_cpu(cpu, dest))
+ en1 |= 1ull << bit;
+ else
+ en1 &= ~(1ull << bit);
+ cvmx_write_csr(CVMX_CIU_INTX_EN1(coreid * 2 + 1), en1);
+ }
+ /*
+ * We need to do a read after the last update to make sure all
+ * of them are done.
+ */
+ cvmx_read_csr(CVMX_CIU_INTX_EN1(cvmx_get_core_num() * 2 + 1));
+ write_unlock(&octeon_irq_ciu1_rwlock);
+}
+#endif
+
+static struct irq_chip octeon_irq_chip_ciu1 = {
+ .name = "CIU1",
+ .enable = octeon_irq_ciu1_enable,
+ .disable = octeon_irq_ciu1_disable,
+ .ack = octeon_irq_ciu1_ack,
+ .eoi = octeon_irq_ciu1_eoi,
+#ifdef CONFIG_SMP
+ .set_affinity = octeon_irq_ciu1_set_affinity,
+#endif
+};
+
+#ifdef CONFIG_PCI_MSI
+
+static void octeon_irq_msi_ack(unsigned int irq)
+{
+ if (!octeon_has_feature(OCTEON_FEATURE_PCIE)) {
+ /* These chips have PCI */
+ cvmx_write_csr(CVMX_NPI_NPI_MSI_RCV,
+ 1ull << (irq - OCTEON_IRQ_MSI_BIT0));
+ } else {
+ /*
+ * These chips have PCIe. Thankfully the ACK doesn't
+ * need any locking.
+ */
+ cvmx_write_csr(CVMX_PEXP_NPEI_MSI_RCV0,
+ 1ull << (irq - OCTEON_IRQ_MSI_BIT0));
+ }
+}
+
+static void octeon_irq_msi_eoi(unsigned int irq)
+{
+ /* Nothing needed */
+}
+
+static void octeon_irq_msi_enable(unsigned int irq)
+{
+ if (!octeon_has_feature(OCTEON_FEATURE_PCIE)) {
+ /*
+ * Octeon PCI doesn't have the ability to mask/unmask
+ * MSI interrupts individually. Instead of
+ * masking/unmasking them in groups of 16, we simple
+ * assume MSI devices are well behaved. MSI
+ * interrupts are always enable and the ACK is assumed
+ * to be enough.
+ */
+ } else {
+ /* These chips have PCIe. Note that we only support
+ * the first 64 MSI interrupts. Unfortunately all the
+ * MSI enables are in the same register. We use
+ * MSI0's lock to control access to them all.
+ */
+ uint64_t en;
+ unsigned long flags;
+ spin_lock_irqsave(&octeon_irq_msi_lock, flags);
+ en = cvmx_read_csr(CVMX_PEXP_NPEI_MSI_ENB0);
+ en |= 1ull << (irq - OCTEON_IRQ_MSI_BIT0);
+ cvmx_write_csr(CVMX_PEXP_NPEI_MSI_ENB0, en);
+ cvmx_read_csr(CVMX_PEXP_NPEI_MSI_ENB0);
+ spin_unlock_irqrestore(&octeon_irq_msi_lock, flags);
+ }
+}
+
+static void octeon_irq_msi_disable(unsigned int irq)
+{
+ if (!octeon_has_feature(OCTEON_FEATURE_PCIE)) {
+ /* See comment in enable */
+ } else {
+ /*
+ * These chips have PCIe. Note that we only support
+ * the first 64 MSI interrupts. Unfortunately all the
+ * MSI enables are in the same register. We use
+ * MSI0's lock to control access to them all.
+ */
+ uint64_t en;
+ unsigned long flags;
+ spin_lock_irqsave(&octeon_irq_msi_lock, flags);
+ en = cvmx_read_csr(CVMX_PEXP_NPEI_MSI_ENB0);
+ en &= ~(1ull << (irq - OCTEON_IRQ_MSI_BIT0));
+ cvmx_write_csr(CVMX_PEXP_NPEI_MSI_ENB0, en);
+ cvmx_read_csr(CVMX_PEXP_NPEI_MSI_ENB0);
+ spin_unlock_irqrestore(&octeon_irq_msi_lock, flags);
+ }
+}
+
+static struct irq_chip octeon_irq_chip_msi = {
+ .name = "MSI",
+ .enable = octeon_irq_msi_enable,
+ .disable = octeon_irq_msi_disable,
+ .ack = octeon_irq_msi_ack,
+ .eoi = octeon_irq_msi_eoi,
+};
+#endif
+
+void __init arch_init_irq(void)
+{
+ int irq;
+
+#ifdef CONFIG_SMP
+ /* Set the default affinity to the boot cpu. */
+ cpumask_clear(irq_default_affinity);
+ cpumask_set_cpu(smp_processor_id(), irq_default_affinity);
+#endif
+
+ if (NR_IRQS < OCTEON_IRQ_LAST)
+ pr_err("octeon_irq_init: NR_IRQS is set too low\n");
+
+ /* 0 - 15 reserved for i8259 master and slave controller. */
+
+ /* 17 - 23 Mips internal */
+ for (irq = OCTEON_IRQ_SW0; irq <= OCTEON_IRQ_TIMER; irq++) {
+ set_irq_chip_and_handler(irq, &octeon_irq_chip_core,
+ handle_percpu_irq);
+ }
+
+ /* 24 - 87 CIU_INT_SUM0 */
+ for (irq = OCTEON_IRQ_WORKQ0; irq <= OCTEON_IRQ_BOOTDMA; irq++) {
+ set_irq_chip_and_handler(irq, &octeon_irq_chip_ciu0,
+ handle_percpu_irq);
+ }
+
+ /* 88 - 151 CIU_INT_SUM1 */
+ for (irq = OCTEON_IRQ_WDOG0; irq <= OCTEON_IRQ_RESERVED151; irq++) {
+ set_irq_chip_and_handler(irq, &octeon_irq_chip_ciu1,
+ handle_percpu_irq);
+ }
+
+#ifdef CONFIG_PCI_MSI
+ /* 152 - 215 PCI/PCIe MSI interrupts */
+ for (irq = OCTEON_IRQ_MSI_BIT0; irq <= OCTEON_IRQ_MSI_BIT63; irq++) {
+ set_irq_chip_and_handler(irq, &octeon_irq_chip_msi,
+ handle_percpu_irq);
+ }
+#endif
+ set_c0_status(0x300 << 2);
+}
+
+asmlinkage void plat_irq_dispatch(void)
+{
+ const unsigned long core_id = cvmx_get_core_num();
+ const uint64_t ciu_sum0_address = CVMX_CIU_INTX_SUM0(core_id * 2);
+ const uint64_t ciu_en0_address = CVMX_CIU_INTX_EN0(core_id * 2);
+ const uint64_t ciu_sum1_address = CVMX_CIU_INT_SUM1;
+ const uint64_t ciu_en1_address = CVMX_CIU_INTX_EN1(core_id * 2 + 1);
+ unsigned long cop0_cause;
+ unsigned long cop0_status;
+ uint64_t ciu_en;
+ uint64_t ciu_sum;
+
+ while (1) {
+ cop0_cause = read_c0_cause();
+ cop0_status = read_c0_status();
+ cop0_cause &= cop0_status;
+ cop0_cause &= ST0_IM;
+
+ if (unlikely(cop0_cause & STATUSF_IP2)) {
+ ciu_sum = cvmx_read_csr(ciu_sum0_address);
+ ciu_en = cvmx_read_csr(ciu_en0_address);
+ ciu_sum &= ciu_en;
+ if (likely(ciu_sum))
+ do_IRQ(fls64(ciu_sum) + OCTEON_IRQ_WORKQ0 - 1);
+ else
+ spurious_interrupt();
+ } else if (unlikely(cop0_cause & STATUSF_IP3)) {
+ ciu_sum = cvmx_read_csr(ciu_sum1_address);
+ ciu_en = cvmx_read_csr(ciu_en1_address);
+ ciu_sum &= ciu_en;
+ if (likely(ciu_sum))
+ do_IRQ(fls64(ciu_sum) + OCTEON_IRQ_WDOG0 - 1);
+ else
+ spurious_interrupt();
+ } else if (likely(cop0_cause)) {
+ do_IRQ(fls(cop0_cause) - 9 + MIPS_CPU_IRQ_BASE);
+ } else {
+ break;
+ }
+ }
+}
diff --git a/arch/mips/cavium-octeon/octeon-memcpy.S b/arch/mips/cavium-octeon/octeon-memcpy.S
new file mode 100644
index 000000000000..88e0cddca205
--- /dev/null
+++ b/arch/mips/cavium-octeon/octeon-memcpy.S
@@ -0,0 +1,521 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Unified implementation of memcpy, memmove and the __copy_user backend.
+ *
+ * Copyright (C) 1998, 99, 2000, 01, 2002 Ralf Baechle (ralf@gnu.org)
+ * Copyright (C) 1999, 2000, 01, 2002 Silicon Graphics, Inc.
+ * Copyright (C) 2002 Broadcom, Inc.
+ * memcpy/copy_user author: Mark Vandevoorde
+ *
+ * Mnemonic names for arguments to memcpy/__copy_user
+ */
+
+#include <asm/asm.h>
+#include <asm/asm-offsets.h>
+#include <asm/regdef.h>
+
+#define dst a0
+#define src a1
+#define len a2
+
+/*
+ * Spec
+ *
+ * memcpy copies len bytes from src to dst and sets v0 to dst.
+ * It assumes that
+ * - src and dst don't overlap
+ * - src is readable
+ * - dst is writable
+ * memcpy uses the standard calling convention
+ *
+ * __copy_user copies up to len bytes from src to dst and sets a2 (len) to
+ * the number of uncopied bytes due to an exception caused by a read or write.
+ * __copy_user assumes that src and dst don't overlap, and that the call is
+ * implementing one of the following:
+ * copy_to_user
+ * - src is readable (no exceptions when reading src)
+ * copy_from_user
+ * - dst is writable (no exceptions when writing dst)
+ * __copy_user uses a non-standard calling convention; see
+ * arch/mips/include/asm/uaccess.h
+ *
+ * When an exception happens on a load, the handler must
+ # ensure that all of the destination buffer is overwritten to prevent
+ * leaking information to user mode programs.
+ */
+
+/*
+ * Implementation
+ */
+
+/*
+ * The exception handler for loads requires that:
+ * 1- AT contain the address of the byte just past the end of the source
+ * of the copy,
+ * 2- src_entry <= src < AT, and
+ * 3- (dst - src) == (dst_entry - src_entry),
+ * The _entry suffix denotes values when __copy_user was called.
+ *
+ * (1) is set up up by uaccess.h and maintained by not writing AT in copy_user
+ * (2) is met by incrementing src by the number of bytes copied
+ * (3) is met by not doing loads between a pair of increments of dst and src
+ *
+ * The exception handlers for stores adjust len (if necessary) and return.
+ * These handlers do not need to overwrite any data.
+ *
+ * For __rmemcpy and memmove an exception is always a kernel bug, therefore
+ * they're not protected.
+ */
+
+#define EXC(inst_reg,addr,handler) \
+9: inst_reg, addr; \
+ .section __ex_table,"a"; \
+ PTR 9b, handler; \
+ .previous
+
+/*
+ * Only on the 64-bit kernel we can made use of 64-bit registers.
+ */
+#ifdef CONFIG_64BIT
+#define USE_DOUBLE
+#endif
+
+#ifdef USE_DOUBLE
+
+#define LOAD ld
+#define LOADL ldl
+#define LOADR ldr
+#define STOREL sdl
+#define STORER sdr
+#define STORE sd
+#define ADD daddu
+#define SUB dsubu
+#define SRL dsrl
+#define SRA dsra
+#define SLL dsll
+#define SLLV dsllv
+#define SRLV dsrlv
+#define NBYTES 8
+#define LOG_NBYTES 3
+
+/*
+ * As we are sharing code base with the mips32 tree (which use the o32 ABI
+ * register definitions). We need to redefine the register definitions from
+ * the n64 ABI register naming to the o32 ABI register naming.
+ */
+#undef t0
+#undef t1
+#undef t2
+#undef t3
+#define t0 $8
+#define t1 $9
+#define t2 $10
+#define t3 $11
+#define t4 $12
+#define t5 $13
+#define t6 $14
+#define t7 $15
+
+#else
+
+#define LOAD lw
+#define LOADL lwl
+#define LOADR lwr
+#define STOREL swl
+#define STORER swr
+#define STORE sw
+#define ADD addu
+#define SUB subu
+#define SRL srl
+#define SLL sll
+#define SRA sra
+#define SLLV sllv
+#define SRLV srlv
+#define NBYTES 4
+#define LOG_NBYTES 2
+
+#endif /* USE_DOUBLE */
+
+#ifdef CONFIG_CPU_LITTLE_ENDIAN
+#define LDFIRST LOADR
+#define LDREST LOADL
+#define STFIRST STORER
+#define STREST STOREL
+#define SHIFT_DISCARD SLLV
+#else
+#define LDFIRST LOADL
+#define LDREST LOADR
+#define STFIRST STOREL
+#define STREST STORER
+#define SHIFT_DISCARD SRLV
+#endif
+
+#define FIRST(unit) ((unit)*NBYTES)
+#define REST(unit) (FIRST(unit)+NBYTES-1)
+#define UNIT(unit) FIRST(unit)
+
+#define ADDRMASK (NBYTES-1)
+
+ .text
+ .set noreorder
+ .set noat
+
+/*
+ * A combined memcpy/__copy_user
+ * __copy_user sets len to 0 for success; else to an upper bound of
+ * the number of uncopied bytes.
+ * memcpy sets v0 to dst.
+ */
+ .align 5
+LEAF(memcpy) /* a0=dst a1=src a2=len */
+ move v0, dst /* return value */
+__memcpy:
+FEXPORT(__copy_user)
+ /*
+ * Note: dst & src may be unaligned, len may be 0
+ * Temps
+ */
+ #
+ # Octeon doesn't care if the destination is unaligned. The hardware
+ # can fix it faster than we can special case the assembly.
+ #
+ pref 0, 0(src)
+ sltu t0, len, NBYTES # Check if < 1 word
+ bnez t0, copy_bytes_checklen
+ and t0, src, ADDRMASK # Check if src unaligned
+ bnez t0, src_unaligned
+ sltu t0, len, 4*NBYTES # Check if < 4 words
+ bnez t0, less_than_4units
+ sltu t0, len, 8*NBYTES # Check if < 8 words
+ bnez t0, less_than_8units
+ sltu t0, len, 16*NBYTES # Check if < 16 words
+ bnez t0, cleanup_both_aligned
+ sltu t0, len, 128+1 # Check if len < 129
+ bnez t0, 1f # Skip prefetch if len is too short
+ sltu t0, len, 256+1 # Check if len < 257
+ bnez t0, 1f # Skip prefetch if len is too short
+ pref 0, 128(src) # We must not prefetch invalid addresses
+ #
+ # This is where we loop if there is more than 128 bytes left
+2: pref 0, 256(src) # We must not prefetch invalid addresses
+ #
+ # This is where we loop if we can't prefetch anymore
+1:
+EXC( LOAD t0, UNIT(0)(src), l_exc)
+EXC( LOAD t1, UNIT(1)(src), l_exc_copy)
+EXC( LOAD t2, UNIT(2)(src), l_exc_copy)
+EXC( LOAD t3, UNIT(3)(src), l_exc_copy)
+ SUB len, len, 16*NBYTES
+EXC( STORE t0, UNIT(0)(dst), s_exc_p16u)
+EXC( STORE t1, UNIT(1)(dst), s_exc_p15u)
+EXC( STORE t2, UNIT(2)(dst), s_exc_p14u)
+EXC( STORE t3, UNIT(3)(dst), s_exc_p13u)
+EXC( LOAD t0, UNIT(4)(src), l_exc_copy)
+EXC( LOAD t1, UNIT(5)(src), l_exc_copy)
+EXC( LOAD t2, UNIT(6)(src), l_exc_copy)
+EXC( LOAD t3, UNIT(7)(src), l_exc_copy)
+EXC( STORE t0, UNIT(4)(dst), s_exc_p12u)
+EXC( STORE t1, UNIT(5)(dst), s_exc_p11u)
+EXC( STORE t2, UNIT(6)(dst), s_exc_p10u)
+ ADD src, src, 16*NBYTES
+EXC( STORE t3, UNIT(7)(dst), s_exc_p9u)
+ ADD dst, dst, 16*NBYTES
+EXC( LOAD t0, UNIT(-8)(src), l_exc_copy)
+EXC( LOAD t1, UNIT(-7)(src), l_exc_copy)
+EXC( LOAD t2, UNIT(-6)(src), l_exc_copy)
+EXC( LOAD t3, UNIT(-5)(src), l_exc_copy)
+EXC( STORE t0, UNIT(-8)(dst), s_exc_p8u)
+EXC( STORE t1, UNIT(-7)(dst), s_exc_p7u)
+EXC( STORE t2, UNIT(-6)(dst), s_exc_p6u)
+EXC( STORE t3, UNIT(-5)(dst), s_exc_p5u)
+EXC( LOAD t0, UNIT(-4)(src), l_exc_copy)
+EXC( LOAD t1, UNIT(-3)(src), l_exc_copy)
+EXC( LOAD t2, UNIT(-2)(src), l_exc_copy)
+EXC( LOAD t3, UNIT(-1)(src), l_exc_copy)
+EXC( STORE t0, UNIT(-4)(dst), s_exc_p4u)
+EXC( STORE t1, UNIT(-3)(dst), s_exc_p3u)
+EXC( STORE t2, UNIT(-2)(dst), s_exc_p2u)
+EXC( STORE t3, UNIT(-1)(dst), s_exc_p1u)
+ sltu t0, len, 256+1 # See if we can prefetch more
+ beqz t0, 2b
+ sltu t0, len, 128 # See if we can loop more time
+ beqz t0, 1b
+ nop
+ #
+ # Jump here if there are less than 16*NBYTES left.
+ #
+cleanup_both_aligned:
+ beqz len, done
+ sltu t0, len, 8*NBYTES
+ bnez t0, less_than_8units
+ nop
+EXC( LOAD t0, UNIT(0)(src), l_exc)
+EXC( LOAD t1, UNIT(1)(src), l_exc_copy)
+EXC( LOAD t2, UNIT(2)(src), l_exc_copy)
+EXC( LOAD t3, UNIT(3)(src), l_exc_copy)
+ SUB len, len, 8*NBYTES
+EXC( STORE t0, UNIT(0)(dst), s_exc_p8u)
+EXC( STORE t1, UNIT(1)(dst), s_exc_p7u)
+EXC( STORE t2, UNIT(2)(dst), s_exc_p6u)
+EXC( STORE t3, UNIT(3)(dst), s_exc_p5u)
+EXC( LOAD t0, UNIT(4)(src), l_exc_copy)
+EXC( LOAD t1, UNIT(5)(src), l_exc_copy)
+EXC( LOAD t2, UNIT(6)(src), l_exc_copy)
+EXC( LOAD t3, UNIT(7)(src), l_exc_copy)
+EXC( STORE t0, UNIT(4)(dst), s_exc_p4u)
+EXC( STORE t1, UNIT(5)(dst), s_exc_p3u)
+EXC( STORE t2, UNIT(6)(dst), s_exc_p2u)
+EXC( STORE t3, UNIT(7)(dst), s_exc_p1u)
+ ADD src, src, 8*NBYTES
+ beqz len, done
+ ADD dst, dst, 8*NBYTES
+ #
+ # Jump here if there are less than 8*NBYTES left.
+ #
+less_than_8units:
+ sltu t0, len, 4*NBYTES
+ bnez t0, less_than_4units
+ nop
+EXC( LOAD t0, UNIT(0)(src), l_exc)
+EXC( LOAD t1, UNIT(1)(src), l_exc_copy)
+EXC( LOAD t2, UNIT(2)(src), l_exc_copy)
+EXC( LOAD t3, UNIT(3)(src), l_exc_copy)
+ SUB len, len, 4*NBYTES
+EXC( STORE t0, UNIT(0)(dst), s_exc_p4u)
+EXC( STORE t1, UNIT(1)(dst), s_exc_p3u)
+EXC( STORE t2, UNIT(2)(dst), s_exc_p2u)
+EXC( STORE t3, UNIT(3)(dst), s_exc_p1u)
+ ADD src, src, 4*NBYTES
+ beqz len, done
+ ADD dst, dst, 4*NBYTES
+ #
+ # Jump here if there are less than 4*NBYTES left. This means
+ # we may need to copy up to 3 NBYTES words.
+ #
+less_than_4units:
+ sltu t0, len, 1*NBYTES
+ bnez t0, copy_bytes_checklen
+ nop
+ #
+ # 1) Copy NBYTES, then check length again
+ #
+EXC( LOAD t0, 0(src), l_exc)
+ SUB len, len, NBYTES
+ sltu t1, len, 8
+EXC( STORE t0, 0(dst), s_exc_p1u)
+ ADD src, src, NBYTES
+ bnez t1, copy_bytes_checklen
+ ADD dst, dst, NBYTES
+ #
+ # 2) Copy NBYTES, then check length again
+ #
+EXC( LOAD t0, 0(src), l_exc)
+ SUB len, len, NBYTES
+ sltu t1, len, 8
+EXC( STORE t0, 0(dst), s_exc_p1u)
+ ADD src, src, NBYTES
+ bnez t1, copy_bytes_checklen
+ ADD dst, dst, NBYTES
+ #
+ # 3) Copy NBYTES, then check length again
+ #
+EXC( LOAD t0, 0(src), l_exc)
+ SUB len, len, NBYTES
+ ADD src, src, NBYTES
+ ADD dst, dst, NBYTES
+ b copy_bytes_checklen
+EXC( STORE t0, -8(dst), s_exc_p1u)
+
+src_unaligned:
+#define rem t8
+ SRL t0, len, LOG_NBYTES+2 # +2 for 4 units/iter
+ beqz t0, cleanup_src_unaligned
+ and rem, len, (4*NBYTES-1) # rem = len % 4*NBYTES
+1:
+/*
+ * Avoid consecutive LD*'s to the same register since some mips
+ * implementations can't issue them in the same cycle.
+ * It's OK to load FIRST(N+1) before REST(N) because the two addresses
+ * are to the same unit (unless src is aligned, but it's not).
+ */
+EXC( LDFIRST t0, FIRST(0)(src), l_exc)
+EXC( LDFIRST t1, FIRST(1)(src), l_exc_copy)
+ SUB len, len, 4*NBYTES
+EXC( LDREST t0, REST(0)(src), l_exc_copy)
+EXC( LDREST t1, REST(1)(src), l_exc_copy)
+EXC( LDFIRST t2, FIRST(2)(src), l_exc_copy)
+EXC( LDFIRST t3, FIRST(3)(src), l_exc_copy)
+EXC( LDREST t2, REST(2)(src), l_exc_copy)
+EXC( LDREST t3, REST(3)(src), l_exc_copy)
+ ADD src, src, 4*NBYTES
+EXC( STORE t0, UNIT(0)(dst), s_exc_p4u)
+EXC( STORE t1, UNIT(1)(dst), s_exc_p3u)
+EXC( STORE t2, UNIT(2)(dst), s_exc_p2u)
+EXC( STORE t3, UNIT(3)(dst), s_exc_p1u)
+ bne len, rem, 1b
+ ADD dst, dst, 4*NBYTES
+
+cleanup_src_unaligned:
+ beqz len, done
+ and rem, len, NBYTES-1 # rem = len % NBYTES
+ beq rem, len, copy_bytes
+ nop
+1:
+EXC( LDFIRST t0, FIRST(0)(src), l_exc)
+EXC( LDREST t0, REST(0)(src), l_exc_copy)
+ SUB len, len, NBYTES
+EXC( STORE t0, 0(dst), s_exc_p1u)
+ ADD src, src, NBYTES
+ bne len, rem, 1b
+ ADD dst, dst, NBYTES
+
+copy_bytes_checklen:
+ beqz len, done
+ nop
+copy_bytes:
+ /* 0 < len < NBYTES */
+#define COPY_BYTE(N) \
+EXC( lb t0, N(src), l_exc); \
+ SUB len, len, 1; \
+ beqz len, done; \
+EXC( sb t0, N(dst), s_exc_p1)
+
+ COPY_BYTE(0)
+ COPY_BYTE(1)
+#ifdef USE_DOUBLE
+ COPY_BYTE(2)
+ COPY_BYTE(3)
+ COPY_BYTE(4)
+ COPY_BYTE(5)
+#endif
+EXC( lb t0, NBYTES-2(src), l_exc)
+ SUB len, len, 1
+ jr ra
+EXC( sb t0, NBYTES-2(dst), s_exc_p1)
+done:
+ jr ra
+ nop
+ END(memcpy)
+
+l_exc_copy:
+ /*
+ * Copy bytes from src until faulting load address (or until a
+ * lb faults)
+ *
+ * When reached by a faulting LDFIRST/LDREST, THREAD_BUADDR($28)
+ * may be more than a byte beyond the last address.
+ * Hence, the lb below may get an exception.
+ *
+ * Assumes src < THREAD_BUADDR($28)
+ */
+ LOAD t0, TI_TASK($28)
+ nop
+ LOAD t0, THREAD_BUADDR(t0)
+1:
+EXC( lb t1, 0(src), l_exc)
+ ADD src, src, 1
+ sb t1, 0(dst) # can't fault -- we're copy_from_user
+ bne src, t0, 1b
+ ADD dst, dst, 1
+l_exc:
+ LOAD t0, TI_TASK($28)
+ nop
+ LOAD t0, THREAD_BUADDR(t0) # t0 is just past last good address
+ nop
+ SUB len, AT, t0 # len number of uncopied bytes
+ /*
+ * Here's where we rely on src and dst being incremented in tandem,
+ * See (3) above.
+ * dst += (fault addr - src) to put dst at first byte to clear
+ */
+ ADD dst, t0 # compute start address in a1
+ SUB dst, src
+ /*
+ * Clear len bytes starting at dst. Can't call __bzero because it
+ * might modify len. An inefficient loop for these rare times...
+ */
+ beqz len, done
+ SUB src, len, 1
+1: sb zero, 0(dst)
+ ADD dst, dst, 1
+ bnez src, 1b
+ SUB src, src, 1
+ jr ra
+ nop
+
+
+#define SEXC(n) \
+s_exc_p ## n ## u: \
+ jr ra; \
+ ADD len, len, n*NBYTES
+
+SEXC(16)
+SEXC(15)
+SEXC(14)
+SEXC(13)
+SEXC(12)
+SEXC(11)
+SEXC(10)
+SEXC(9)
+SEXC(8)
+SEXC(7)
+SEXC(6)
+SEXC(5)
+SEXC(4)
+SEXC(3)
+SEXC(2)
+SEXC(1)
+
+s_exc_p1:
+ jr ra
+ ADD len, len, 1
+s_exc:
+ jr ra
+ nop
+
+ .align 5
+LEAF(memmove)
+ ADD t0, a0, a2
+ ADD t1, a1, a2
+ sltu t0, a1, t0 # dst + len <= src -> memcpy
+ sltu t1, a0, t1 # dst >= src + len -> memcpy
+ and t0, t1
+ beqz t0, __memcpy
+ move v0, a0 /* return value */
+ beqz a2, r_out
+ END(memmove)
+
+ /* fall through to __rmemcpy */
+LEAF(__rmemcpy) /* a0=dst a1=src a2=len */
+ sltu t0, a1, a0
+ beqz t0, r_end_bytes_up # src >= dst
+ nop
+ ADD a0, a2 # dst = dst + len
+ ADD a1, a2 # src = src + len
+
+r_end_bytes:
+ lb t0, -1(a1)
+ SUB a2, a2, 0x1
+ sb t0, -1(a0)
+ SUB a1, a1, 0x1
+ bnez a2, r_end_bytes
+ SUB a0, a0, 0x1
+
+r_out:
+ jr ra
+ move a2, zero
+
+r_end_bytes_up:
+ lb t0, (a1)
+ SUB a2, a2, 0x1
+ sb t0, (a0)
+ ADD a1, a1, 0x1
+ bnez a2, r_end_bytes_up
+ ADD a0, a0, 0x1
+
+ jr ra
+ move a2, zero
+ END(__rmemcpy)
diff --git a/arch/mips/cavium-octeon/serial.c b/arch/mips/cavium-octeon/serial.c
new file mode 100644
index 000000000000..8240728d485a
--- /dev/null
+++ b/arch/mips/cavium-octeon/serial.c
@@ -0,0 +1,136 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2004-2007 Cavium Networks
+ */
+#include <linux/console.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/serial.h>
+#include <linux/serial_8250.h>
+#include <linux/serial_reg.h>
+#include <linux/tty.h>
+
+#include <asm/time.h>
+
+#include <asm/octeon/octeon.h>
+
+#ifdef CONFIG_GDB_CONSOLE
+#define DEBUG_UART 0
+#else
+#define DEBUG_UART 1
+#endif
+
+unsigned int octeon_serial_in(struct uart_port *up, int offset)
+{
+ int rv = cvmx_read_csr((uint64_t)(up->membase + (offset << 3)));
+ if (offset == UART_IIR && (rv & 0xf) == 7) {
+ /* Busy interrupt, read the USR (39) and try again. */
+ cvmx_read_csr((uint64_t)(up->membase + (39 << 3)));
+ rv = cvmx_read_csr((uint64_t)(up->membase + (offset << 3)));
+ }
+ return rv;
+}
+
+void octeon_serial_out(struct uart_port *up, int offset, int value)
+{
+ /*
+ * If bits 6 or 7 of the OCTEON UART's LCR are set, it quits
+ * working.
+ */
+ if (offset == UART_LCR)
+ value &= 0x9f;
+ cvmx_write_csr((uint64_t)(up->membase + (offset << 3)), (u8)value);
+}
+
+/*
+ * Allocated in .bss, so it is all zeroed.
+ */
+#define OCTEON_MAX_UARTS 3
+static struct plat_serial8250_port octeon_uart8250_data[OCTEON_MAX_UARTS + 1];
+static struct platform_device octeon_uart8250_device = {
+ .name = "serial8250",
+ .id = PLAT8250_DEV_PLATFORM,
+ .dev = {
+ .platform_data = octeon_uart8250_data,
+ },
+};
+
+static void __init octeon_uart_set_common(struct plat_serial8250_port *p)
+{
+ p->flags = ASYNC_SKIP_TEST | UPF_SHARE_IRQ | UPF_FIXED_TYPE;
+ p->type = PORT_OCTEON;
+ p->iotype = UPIO_MEM;
+ p->regshift = 3; /* I/O addresses are every 8 bytes */
+ p->uartclk = mips_hpt_frequency;
+ p->serial_in = octeon_serial_in;
+ p->serial_out = octeon_serial_out;
+}
+
+static int __init octeon_serial_init(void)
+{
+ int enable_uart0;
+ int enable_uart1;
+ int enable_uart2;
+ struct plat_serial8250_port *p;
+
+#ifdef CONFIG_CAVIUM_OCTEON_2ND_KERNEL
+ /*
+ * If we are configured to run as the second of two kernels,
+ * disable uart0 and enable uart1. Uart0 is owned by the first
+ * kernel
+ */
+ enable_uart0 = 0;
+ enable_uart1 = 1;
+#else
+ /*
+ * We are configured for the first kernel. We'll enable uart0
+ * if the bootloader told us to use 0, otherwise will enable
+ * uart 1.
+ */
+ enable_uart0 = (octeon_get_boot_uart() == 0);
+ enable_uart1 = (octeon_get_boot_uart() == 1);
+#ifdef CONFIG_KGDB
+ enable_uart1 = 1;
+#endif
+#endif
+
+ /* Right now CN52XX is the only chip with a third uart */
+ enable_uart2 = OCTEON_IS_MODEL(OCTEON_CN52XX);
+
+ p = octeon_uart8250_data;
+ if (enable_uart0) {
+ /* Add a ttyS device for hardware uart 0 */
+ octeon_uart_set_common(p);
+ p->membase = (void *) CVMX_MIO_UARTX_RBR(0);
+ p->mapbase = CVMX_MIO_UARTX_RBR(0) & ((1ull << 49) - 1);
+ p->irq = OCTEON_IRQ_UART0;
+ p++;
+ }
+
+ if (enable_uart1) {
+ /* Add a ttyS device for hardware uart 1 */
+ octeon_uart_set_common(p);
+ p->membase = (void *) CVMX_MIO_UARTX_RBR(1);
+ p->mapbase = CVMX_MIO_UARTX_RBR(1) & ((1ull << 49) - 1);
+ p->irq = OCTEON_IRQ_UART1;
+ p++;
+ }
+ if (enable_uart2) {
+ /* Add a ttyS device for hardware uart 2 */
+ octeon_uart_set_common(p);
+ p->membase = (void *) CVMX_MIO_UART2_RBR;
+ p->mapbase = CVMX_MIO_UART2_RBR & ((1ull << 49) - 1);
+ p->irq = OCTEON_IRQ_UART2;
+ p++;
+ }
+
+ BUG_ON(p > &octeon_uart8250_data[OCTEON_MAX_UARTS]);
+
+ return platform_device_register(&octeon_uart8250_device);
+}
+
+device_initcall(octeon_serial_init);
diff --git a/arch/mips/cavium-octeon/setup.c b/arch/mips/cavium-octeon/setup.c
new file mode 100644
index 000000000000..e085feddb4a4
--- /dev/null
+++ b/arch/mips/cavium-octeon/setup.c
@@ -0,0 +1,929 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2004-2007 Cavium Networks
+ * Copyright (C) 2008 Wind River Systems
+ */
+#include <linux/init.h>
+#include <linux/console.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/serial.h>
+#include <linux/types.h>
+#include <linux/string.h> /* for memset */
+#include <linux/serial.h>
+#include <linux/tty.h>
+#include <linux/time.h>
+#include <linux/platform_device.h>
+#include <linux/serial_core.h>
+#include <linux/serial_8250.h>
+#include <linux/string.h>
+
+#include <asm/processor.h>
+#include <asm/reboot.h>
+#include <asm/smp-ops.h>
+#include <asm/system.h>
+#include <asm/irq_cpu.h>
+#include <asm/mipsregs.h>
+#include <asm/bootinfo.h>
+#include <asm/sections.h>
+#include <asm/time.h>
+
+#include <asm/octeon/octeon.h>
+
+#ifdef CONFIG_CAVIUM_DECODE_RSL
+extern void cvmx_interrupt_rsl_decode(void);
+extern int __cvmx_interrupt_ecc_report_single_bit_errors;
+extern void cvmx_interrupt_rsl_enable(void);
+#endif
+
+extern struct plat_smp_ops octeon_smp_ops;
+
+#ifdef CONFIG_PCI
+extern void pci_console_init(const char *arg);
+#endif
+
+#ifdef CONFIG_CAVIUM_RESERVE32
+extern uint64_t octeon_reserve32_memory;
+#endif
+static unsigned long long MAX_MEMORY = 512ull << 20;
+
+struct octeon_boot_descriptor *octeon_boot_desc_ptr;
+
+struct cvmx_bootinfo *octeon_bootinfo;
+EXPORT_SYMBOL(octeon_bootinfo);
+
+#ifdef CONFIG_CAVIUM_RESERVE32
+uint64_t octeon_reserve32_memory;
+EXPORT_SYMBOL(octeon_reserve32_memory);
+#endif
+
+static int octeon_uart;
+
+extern asmlinkage void handle_int(void);
+extern asmlinkage void plat_irq_dispatch(void);
+
+/**
+ * Return non zero if we are currently running in the Octeon simulator
+ *
+ * Returns
+ */
+int octeon_is_simulation(void)
+{
+ return octeon_bootinfo->board_type == CVMX_BOARD_TYPE_SIM;
+}
+EXPORT_SYMBOL(octeon_is_simulation);
+
+/**
+ * Return true if Octeon is in PCI Host mode. This means
+ * Linux can control the PCI bus.
+ *
+ * Returns Non zero if Octeon in host mode.
+ */
+int octeon_is_pci_host(void)
+{
+#ifdef CONFIG_PCI
+ return octeon_bootinfo->config_flags & CVMX_BOOTINFO_CFG_FLAG_PCI_HOST;
+#else
+ return 0;
+#endif
+}
+
+/**
+ * Get the clock rate of Octeon
+ *
+ * Returns Clock rate in HZ
+ */
+uint64_t octeon_get_clock_rate(void)
+{
+ if (octeon_is_simulation())
+ octeon_bootinfo->eclock_hz = 6000000;
+ return octeon_bootinfo->eclock_hz;
+}
+EXPORT_SYMBOL(octeon_get_clock_rate);
+
+/**
+ * Write to the LCD display connected to the bootbus. This display
+ * exists on most Cavium evaluation boards. If it doesn't exist, then
+ * this function doesn't do anything.
+ *
+ * @s: String to write
+ */
+void octeon_write_lcd(const char *s)
+{
+ if (octeon_bootinfo->led_display_base_addr) {
+ void __iomem *lcd_address =
+ ioremap_nocache(octeon_bootinfo->led_display_base_addr,
+ 8);
+ int i;
+ for (i = 0; i < 8; i++, s++) {
+ if (*s)
+ iowrite8(*s, lcd_address + i);
+ else
+ iowrite8(' ', lcd_address + i);
+ }
+ iounmap(lcd_address);
+ }
+}
+
+/**
+ * Return the console uart passed by the bootloader
+ *
+ * Returns uart (0 or 1)
+ */
+int octeon_get_boot_uart(void)
+{
+ int uart;
+#ifdef CONFIG_CAVIUM_OCTEON_2ND_KERNEL
+ uart = 1;
+#else
+ uart = (octeon_boot_desc_ptr->flags & OCTEON_BL_FLAG_CONSOLE_UART1) ?
+ 1 : 0;
+#endif
+ return uart;
+}
+
+/**
+ * Get the coremask Linux was booted on.
+ *
+ * Returns Core mask
+ */
+int octeon_get_boot_coremask(void)
+{
+ return octeon_boot_desc_ptr->core_mask;
+}
+
+/**
+ * Check the hardware BIST results for a CPU
+ */
+void octeon_check_cpu_bist(void)
+{
+ const int coreid = cvmx_get_core_num();
+ unsigned long long mask;
+ unsigned long long bist_val;
+
+ /* Check BIST results for COP0 registers */
+ mask = 0x1f00000000ull;
+ bist_val = read_octeon_c0_icacheerr();
+ if (bist_val & mask)
+ pr_err("Core%d BIST Failure: CacheErr(icache) = 0x%llx\n",
+ coreid, bist_val);
+
+ bist_val = read_octeon_c0_dcacheerr();
+ if (bist_val & 1)
+ pr_err("Core%d L1 Dcache parity error: "
+ "CacheErr(dcache) = 0x%llx\n",
+ coreid, bist_val);
+
+ mask = 0xfc00000000000000ull;
+ bist_val = read_c0_cvmmemctl();
+ if (bist_val & mask)
+ pr_err("Core%d BIST Failure: COP0_CVM_MEM_CTL = 0x%llx\n",
+ coreid, bist_val);
+
+ write_octeon_c0_dcacheerr(0);
+}
+
+#ifdef CONFIG_CAVIUM_RESERVE32_USE_WIRED_TLB
+/**
+ * Called on every core to setup the wired tlb entry needed
+ * if CONFIG_CAVIUM_RESERVE32_USE_WIRED_TLB is set.
+ *
+ */
+static void octeon_hal_setup_per_cpu_reserved32(void *unused)
+{
+ /*
+ * The config has selected to wire the reserve32 memory for all
+ * userspace applications. We need to put a wired TLB entry in for each
+ * 512MB of reserve32 memory. We only handle double 256MB pages here,
+ * so reserve32 must be multiple of 512MB.
+ */
+ uint32_t size = CONFIG_CAVIUM_RESERVE32;
+ uint32_t entrylo0 =
+ 0x7 | ((octeon_reserve32_memory & ((1ul << 40) - 1)) >> 6);
+ uint32_t entrylo1 = entrylo0 + (256 << 14);
+ uint32_t entryhi = (0x80000000UL - (CONFIG_CAVIUM_RESERVE32 << 20));
+ while (size >= 512) {
+#if 0
+ pr_info("CPU%d: Adding double wired TLB entry for 0x%lx\n",
+ smp_processor_id(), entryhi);
+#endif
+ add_wired_entry(entrylo0, entrylo1, entryhi, PM_256M);
+ entrylo0 += 512 << 14;
+ entrylo1 += 512 << 14;
+ entryhi += 512 << 20;
+ size -= 512;
+ }
+}
+#endif /* CONFIG_CAVIUM_RESERVE32_USE_WIRED_TLB */
+
+/**
+ * Called to release the named block which was used to made sure
+ * that nobody used the memory for something else during
+ * init. Now we'll free it so userspace apps can use this
+ * memory region with bootmem_alloc.
+ *
+ * This function is called only once from prom_free_prom_memory().
+ */
+void octeon_hal_setup_reserved32(void)
+{
+#ifdef CONFIG_CAVIUM_RESERVE32_USE_WIRED_TLB
+ on_each_cpu(octeon_hal_setup_per_cpu_reserved32, NULL, 0, 1);
+#endif
+}
+
+/**
+ * Reboot Octeon
+ *
+ * @command: Command to pass to the bootloader. Currently ignored.
+ */
+static void octeon_restart(char *command)
+{
+ /* Disable all watchdogs before soft reset. They don't get cleared */
+#ifdef CONFIG_SMP
+ int cpu;
+ for_each_online_cpu(cpu)
+ cvmx_write_csr(CVMX_CIU_WDOGX(cpu_logical_map(cpu)), 0);
+#else
+ cvmx_write_csr(CVMX_CIU_WDOGX(cvmx_get_core_num()), 0);
+#endif
+
+ mb();
+ while (1)
+ cvmx_write_csr(CVMX_CIU_SOFT_RST, 1);
+}
+
+
+/**
+ * Permanently stop a core.
+ *
+ * @arg: Ignored.
+ */
+static void octeon_kill_core(void *arg)
+{
+ mb();
+ if (octeon_is_simulation()) {
+ /* The simulator needs the watchdog to stop for dead cores */
+ cvmx_write_csr(CVMX_CIU_WDOGX(cvmx_get_core_num()), 0);
+ /* A break instruction causes the simulator stop a core */
+ asm volatile ("sync\nbreak");
+ }
+}
+
+
+/**
+ * Halt the system
+ */
+static void octeon_halt(void)
+{
+ smp_call_function(octeon_kill_core, NULL, 0);
+
+ switch (octeon_bootinfo->board_type) {
+ case CVMX_BOARD_TYPE_NAO38:
+ /* Driving a 1 to GPIO 12 shuts off this board */
+ cvmx_write_csr(CVMX_GPIO_BIT_CFGX(12), 1);
+ cvmx_write_csr(CVMX_GPIO_TX_SET, 0x1000);
+ break;
+ default:
+ octeon_write_lcd("PowerOff");
+ break;
+ }
+
+ octeon_kill_core(NULL);
+}
+
+#if 0
+/**
+ * Platform time init specifics.
+ * Returns
+ */
+void __init plat_time_init(void)
+{
+ /* Nothing special here, but we are required to have one */
+}
+
+#endif
+
+/**
+ * Handle all the error condition interrupts that might occur.
+ *
+ */
+#ifdef CONFIG_CAVIUM_DECODE_RSL
+static irqreturn_t octeon_rlm_interrupt(int cpl, void *dev_id)
+{
+ cvmx_interrupt_rsl_decode();
+ return IRQ_HANDLED;
+}
+#endif
+
+/**
+ * Return a string representing the system type
+ *
+ * Returns
+ */
+const char *octeon_board_type_string(void)
+{
+ static char name[80];
+ sprintf(name, "%s (%s)",
+ cvmx_board_type_to_string(octeon_bootinfo->board_type),
+ octeon_model_get_string(read_c0_prid()));
+ return name;
+}
+
+const char *get_system_type(void)
+ __attribute__ ((alias("octeon_board_type_string")));
+
+void octeon_user_io_init(void)
+{
+ union octeon_cvmemctl cvmmemctl;
+ union cvmx_iob_fau_timeout fau_timeout;
+ union cvmx_pow_nw_tim nm_tim;
+ uint64_t cvmctl;
+
+ /* Get the current settings for CP0_CVMMEMCTL_REG */
+ cvmmemctl.u64 = read_c0_cvmmemctl();
+ /* R/W If set, marked write-buffer entries time out the same
+ * as as other entries; if clear, marked write-buffer entries
+ * use the maximum timeout. */
+ cvmmemctl.s.dismarkwblongto = 1;
+ /* R/W If set, a merged store does not clear the write-buffer
+ * entry timeout state. */
+ cvmmemctl.s.dismrgclrwbto = 0;
+ /* R/W Two bits that are the MSBs of the resultant CVMSEG LM
+ * word location for an IOBDMA. The other 8 bits come from the
+ * SCRADDR field of the IOBDMA. */
+ cvmmemctl.s.iobdmascrmsb = 0;
+ /* R/W If set, SYNCWS and SYNCS only order marked stores; if
+ * clear, SYNCWS and SYNCS only order unmarked
+ * stores. SYNCWSMARKED has no effect when DISSYNCWS is
+ * set. */
+ cvmmemctl.s.syncwsmarked = 0;
+ /* R/W If set, SYNCWS acts as SYNCW and SYNCS acts as SYNC. */
+ cvmmemctl.s.dissyncws = 0;
+ /* R/W If set, no stall happens on write buffer full. */
+ if (OCTEON_IS_MODEL(OCTEON_CN38XX_PASS2))
+ cvmmemctl.s.diswbfst = 1;
+ else
+ cvmmemctl.s.diswbfst = 0;
+ /* R/W If set (and SX set), supervisor-level loads/stores can
+ * use XKPHYS addresses with <48>==0 */
+ cvmmemctl.s.xkmemenas = 0;
+
+ /* R/W If set (and UX set), user-level loads/stores can use
+ * XKPHYS addresses with VA<48>==0 */
+ cvmmemctl.s.xkmemenau = 0;
+
+ /* R/W If set (and SX set), supervisor-level loads/stores can
+ * use XKPHYS addresses with VA<48>==1 */
+ cvmmemctl.s.xkioenas = 0;
+
+ /* R/W If set (and UX set), user-level loads/stores can use
+ * XKPHYS addresses with VA<48>==1 */
+ cvmmemctl.s.xkioenau = 0;
+
+ /* R/W If set, all stores act as SYNCW (NOMERGE must be set
+ * when this is set) RW, reset to 0. */
+ cvmmemctl.s.allsyncw = 0;
+
+ /* R/W If set, no stores merge, and all stores reach the
+ * coherent bus in order. */
+ cvmmemctl.s.nomerge = 0;
+ /* R/W Selects the bit in the counter used for DID time-outs 0
+ * = 231, 1 = 230, 2 = 229, 3 = 214. Actual time-out is
+ * between 1x and 2x this interval. For example, with
+ * DIDTTO=3, expiration interval is between 16K and 32K. */
+ cvmmemctl.s.didtto = 0;
+ /* R/W If set, the (mem) CSR clock never turns off. */
+ cvmmemctl.s.csrckalwys = 0;
+ /* R/W If set, mclk never turns off. */
+ cvmmemctl.s.mclkalwys = 0;
+ /* R/W Selects the bit in the counter used for write buffer
+ * flush time-outs (WBFLT+11) is the bit position in an
+ * internal counter used to determine expiration. The write
+ * buffer expires between 1x and 2x this interval. For
+ * example, with WBFLT = 0, a write buffer expires between 2K
+ * and 4K cycles after the write buffer entry is allocated. */
+ cvmmemctl.s.wbfltime = 0;
+ /* R/W If set, do not put Istream in the L2 cache. */
+ cvmmemctl.s.istrnol2 = 0;
+ /* R/W The write buffer threshold. */
+ cvmmemctl.s.wbthresh = 10;
+ /* R/W If set, CVMSEG is available for loads/stores in
+ * kernel/debug mode. */
+#if CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE > 0
+ cvmmemctl.s.cvmsegenak = 1;
+#else
+ cvmmemctl.s.cvmsegenak = 0;
+#endif
+ /* R/W If set, CVMSEG is available for loads/stores in
+ * supervisor mode. */
+ cvmmemctl.s.cvmsegenas = 0;
+ /* R/W If set, CVMSEG is available for loads/stores in user
+ * mode. */
+ cvmmemctl.s.cvmsegenau = 0;
+ /* R/W Size of local memory in cache blocks, 54 (6912 bytes)
+ * is max legal value. */
+ cvmmemctl.s.lmemsz = CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE;
+
+
+ if (smp_processor_id() == 0)
+ pr_notice("CVMSEG size: %d cache lines (%d bytes)\n",
+ CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE,
+ CONFIG_CAVIUM_OCTEON_CVMSEG_SIZE * 128);
+
+ write_c0_cvmmemctl(cvmmemctl.u64);
+
+ /* Move the performance counter interrupts to IRQ 6 */
+ cvmctl = read_c0_cvmctl();
+ cvmctl &= ~(7 << 7);
+ cvmctl |= 6 << 7;
+ write_c0_cvmctl(cvmctl);
+
+ /* Set a default for the hardware timeouts */
+ fau_timeout.u64 = 0;
+ fau_timeout.s.tout_val = 0xfff;
+ /* Disable tagwait FAU timeout */
+ fau_timeout.s.tout_enb = 0;
+ cvmx_write_csr(CVMX_IOB_FAU_TIMEOUT, fau_timeout.u64);
+
+ nm_tim.u64 = 0;
+ /* 4096 cycles */
+ nm_tim.s.nw_tim = 3;
+ cvmx_write_csr(CVMX_POW_NW_TIM, nm_tim.u64);
+
+ write_octeon_c0_icacheerr(0);
+ write_c0_derraddr1(0);
+}
+
+/**
+ * Early entry point for arch setup
+ */
+void __init prom_init(void)
+{
+ struct cvmx_sysinfo *sysinfo;
+ const int coreid = cvmx_get_core_num();
+ int i;
+ int argc;
+ struct uart_port octeon_port;
+#ifdef CONFIG_CAVIUM_RESERVE32
+ int64_t addr = -1;
+#endif
+ /*
+ * The bootloader passes a pointer to the boot descriptor in
+ * $a3, this is available as fw_arg3.
+ */
+ octeon_boot_desc_ptr = (struct octeon_boot_descriptor *)fw_arg3;
+ octeon_bootinfo =
+ cvmx_phys_to_ptr(octeon_boot_desc_ptr->cvmx_desc_vaddr);
+ cvmx_bootmem_init(cvmx_phys_to_ptr(octeon_bootinfo->phy_mem_desc_addr));
+
+ /*
+ * Only enable the LED controller if we're running on a CN38XX, CN58XX,
+ * or CN56XX. The CN30XX and CN31XX don't have an LED controller.
+ */
+ if (!octeon_is_simulation() &&
+ octeon_has_feature(OCTEON_FEATURE_LED_CONTROLLER)) {
+ cvmx_write_csr(CVMX_LED_EN, 0);
+ cvmx_write_csr(CVMX_LED_PRT, 0);
+ cvmx_write_csr(CVMX_LED_DBG, 0);
+ cvmx_write_csr(CVMX_LED_PRT_FMT, 0);
+ cvmx_write_csr(CVMX_LED_UDD_CNTX(0), 32);
+ cvmx_write_csr(CVMX_LED_UDD_CNTX(1), 32);
+ cvmx_write_csr(CVMX_LED_UDD_DATX(0), 0);
+ cvmx_write_csr(CVMX_LED_UDD_DATX(1), 0);
+ cvmx_write_csr(CVMX_LED_EN, 1);
+ }
+#ifdef CONFIG_CAVIUM_RESERVE32
+ /*
+ * We need to temporarily allocate all memory in the reserve32
+ * region. This makes sure the kernel doesn't allocate this
+ * memory when it is getting memory from the
+ * bootloader. Later, after the memory allocations are
+ * complete, the reserve32 will be freed.
+ */
+#ifdef CONFIG_CAVIUM_RESERVE32_USE_WIRED_TLB
+ if (CONFIG_CAVIUM_RESERVE32 & 0x1ff)
+ pr_err("CAVIUM_RESERVE32 isn't a multiple of 512MB. "
+ "This is required if CAVIUM_RESERVE32_USE_WIRED_TLB "
+ "is set\n");
+ else
+ addr = cvmx_bootmem_phy_named_block_alloc(CONFIG_CAVIUM_RESERVE32 << 20,
+ 0, 0, 512 << 20,
+ "CAVIUM_RESERVE32", 0);
+#else
+ /*
+ * Allocate memory for RESERVED32 aligned on 2MB boundary. This
+ * is in case we later use hugetlb entries with it.
+ */
+ addr = cvmx_bootmem_phy_named_block_alloc(CONFIG_CAVIUM_RESERVE32 << 20,
+ 0, 0, 2 << 20,
+ "CAVIUM_RESERVE32", 0);
+#endif
+ if (addr < 0)
+ pr_err("Failed to allocate CAVIUM_RESERVE32 memory area\n");
+ else
+ octeon_reserve32_memory = addr;
+#endif
+
+#ifdef CONFIG_CAVIUM_OCTEON_LOCK_L2
+ if (cvmx_read_csr(CVMX_L2D_FUS3) & (3ull << 34)) {
+ pr_info("Skipping L2 locking due to reduced L2 cache size\n");
+ } else {
+ uint32_t ebase = read_c0_ebase() & 0x3ffff000;
+#ifdef CONFIG_CAVIUM_OCTEON_LOCK_L2_TLB
+ /* TLB refill */
+ cvmx_l2c_lock_mem_region(ebase, 0x100);
+#endif
+#ifdef CONFIG_CAVIUM_OCTEON_LOCK_L2_EXCEPTION
+ /* General exception */
+ cvmx_l2c_lock_mem_region(ebase + 0x180, 0x80);
+#endif
+#ifdef CONFIG_CAVIUM_OCTEON_LOCK_L2_LOW_LEVEL_INTERRUPT
+ /* Interrupt handler */
+ cvmx_l2c_lock_mem_region(ebase + 0x200, 0x80);
+#endif
+#ifdef CONFIG_CAVIUM_OCTEON_LOCK_L2_INTERRUPT
+ cvmx_l2c_lock_mem_region(__pa_symbol(handle_int), 0x100);
+ cvmx_l2c_lock_mem_region(__pa_symbol(plat_irq_dispatch), 0x80);
+#endif
+#ifdef CONFIG_CAVIUM_OCTEON_LOCK_L2_MEMCPY
+ cvmx_l2c_lock_mem_region(__pa_symbol(memcpy), 0x480);
+#endif
+ }
+#endif
+
+ sysinfo = cvmx_sysinfo_get();
+ memset(sysinfo, 0, sizeof(*sysinfo));
+ sysinfo->system_dram_size = octeon_bootinfo->dram_size << 20;
+ sysinfo->phy_mem_desc_ptr =
+ cvmx_phys_to_ptr(octeon_bootinfo->phy_mem_desc_addr);
+ sysinfo->core_mask = octeon_bootinfo->core_mask;
+ sysinfo->exception_base_addr = octeon_bootinfo->exception_base_addr;
+ sysinfo->cpu_clock_hz = octeon_bootinfo->eclock_hz;
+ sysinfo->dram_data_rate_hz = octeon_bootinfo->dclock_hz * 2;
+ sysinfo->board_type = octeon_bootinfo->board_type;
+ sysinfo->board_rev_major = octeon_bootinfo->board_rev_major;
+ sysinfo->board_rev_minor = octeon_bootinfo->board_rev_minor;
+ memcpy(sysinfo->mac_addr_base, octeon_bootinfo->mac_addr_base,
+ sizeof(sysinfo->mac_addr_base));
+ sysinfo->mac_addr_count = octeon_bootinfo->mac_addr_count;
+ memcpy(sysinfo->board_serial_number,
+ octeon_bootinfo->board_serial_number,
+ sizeof(sysinfo->board_serial_number));
+ sysinfo->compact_flash_common_base_addr =
+ octeon_bootinfo->compact_flash_common_base_addr;
+ sysinfo->compact_flash_attribute_base_addr =
+ octeon_bootinfo->compact_flash_attribute_base_addr;
+ sysinfo->led_display_base_addr = octeon_bootinfo->led_display_base_addr;
+ sysinfo->dfa_ref_clock_hz = octeon_bootinfo->dfa_ref_clock_hz;
+ sysinfo->bootloader_config_flags = octeon_bootinfo->config_flags;
+
+
+ octeon_check_cpu_bist();
+
+ octeon_uart = octeon_get_boot_uart();
+
+ /*
+ * Disable All CIU Interrupts. The ones we need will be
+ * enabled later. Read the SUM register so we know the write
+ * completed.
+ */
+ cvmx_write_csr(CVMX_CIU_INTX_EN0((coreid * 2)), 0);
+ cvmx_write_csr(CVMX_CIU_INTX_EN0((coreid * 2 + 1)), 0);
+ cvmx_write_csr(CVMX_CIU_INTX_EN1((coreid * 2)), 0);
+ cvmx_write_csr(CVMX_CIU_INTX_EN1((coreid * 2 + 1)), 0);
+ cvmx_read_csr(CVMX_CIU_INTX_SUM0((coreid * 2)));
+
+#ifdef CONFIG_SMP
+ octeon_write_lcd("LinuxSMP");
+#else
+ octeon_write_lcd("Linux");
+#endif
+
+#ifdef CONFIG_CAVIUM_GDB
+ /*
+ * When debugging the linux kernel, force the cores to enter
+ * the debug exception handler to break in.
+ */
+ if (octeon_get_boot_debug_flag()) {
+ cvmx_write_csr(CVMX_CIU_DINT, 1 << cvmx_get_core_num());
+ cvmx_read_csr(CVMX_CIU_DINT);
+ }
+#endif
+
+ /*
+ * BIST should always be enabled when doing a soft reset. L2
+ * Cache locking for instance is not cleared unless BIST is
+ * enabled. Unfortunately due to a chip errata G-200 for
+ * Cn38XX and CN31XX, BIST msut be disabled on these parts.
+ */
+ if (OCTEON_IS_MODEL(OCTEON_CN38XX_PASS2) ||
+ OCTEON_IS_MODEL(OCTEON_CN31XX))
+ cvmx_write_csr(CVMX_CIU_SOFT_BIST, 0);
+ else
+ cvmx_write_csr(CVMX_CIU_SOFT_BIST, 1);
+
+ /* Default to 64MB in the simulator to speed things up */
+ if (octeon_is_simulation())
+ MAX_MEMORY = 64ull << 20;
+
+ arcs_cmdline[0] = 0;
+ argc = octeon_boot_desc_ptr->argc;
+ for (i = 0; i < argc; i++) {
+ const char *arg =
+ cvmx_phys_to_ptr(octeon_boot_desc_ptr->argv[i]);
+ if ((strncmp(arg, "MEM=", 4) == 0) ||
+ (strncmp(arg, "mem=", 4) == 0)) {
+ sscanf(arg + 4, "%llu", &MAX_MEMORY);
+ MAX_MEMORY <<= 20;
+ if (MAX_MEMORY == 0)
+ MAX_MEMORY = 32ull << 30;
+ } else if (strcmp(arg, "ecc_verbose") == 0) {
+#ifdef CONFIG_CAVIUM_REPORT_SINGLE_BIT_ECC
+ __cvmx_interrupt_ecc_report_single_bit_errors = 1;
+ pr_notice("Reporting of single bit ECC errors is "
+ "turned on\n");
+#endif
+ } else if (strlen(arcs_cmdline) + strlen(arg) + 1 <
+ sizeof(arcs_cmdline) - 1) {
+ strcat(arcs_cmdline, " ");
+ strcat(arcs_cmdline, arg);
+ }
+ }
+
+ if (strstr(arcs_cmdline, "console=") == NULL) {
+#ifdef CONFIG_GDB_CONSOLE
+ strcat(arcs_cmdline, " console=gdb");
+#else
+#ifdef CONFIG_CAVIUM_OCTEON_2ND_KERNEL
+ strcat(arcs_cmdline, " console=ttyS0,115200");
+#else
+ if (octeon_uart == 1)
+ strcat(arcs_cmdline, " console=ttyS1,115200");
+ else
+ strcat(arcs_cmdline, " console=ttyS0,115200");
+#endif
+#endif
+ }
+
+ if (octeon_is_simulation()) {
+ /*
+ * The simulator uses a mtdram device pre filled with
+ * the filesystem. Also specify the calibration delay
+ * to avoid calculating it every time.
+ */
+ strcat(arcs_cmdline, " rw root=1f00"
+ " lpj=60176 slram=root,0x40000000,+1073741824");
+ }
+
+ mips_hpt_frequency = octeon_get_clock_rate();
+
+ octeon_init_cvmcount();
+
+ _machine_restart = octeon_restart;
+ _machine_halt = octeon_halt;
+
+ memset(&octeon_port, 0, sizeof(octeon_port));
+ /*
+ * For early_serial_setup we don't set the port type or
+ * UPF_FIXED_TYPE.
+ */
+ octeon_port.flags = ASYNC_SKIP_TEST | UPF_SHARE_IRQ;
+ octeon_port.iotype = UPIO_MEM;
+ /* I/O addresses are every 8 bytes */
+ octeon_port.regshift = 3;
+ /* Clock rate of the chip */
+ octeon_port.uartclk = mips_hpt_frequency;
+ octeon_port.fifosize = 64;
+ octeon_port.mapbase = 0x0001180000000800ull + (1024 * octeon_uart);
+ octeon_port.membase = cvmx_phys_to_ptr(octeon_port.mapbase);
+ octeon_port.serial_in = octeon_serial_in;
+ octeon_port.serial_out = octeon_serial_out;
+#ifdef CONFIG_CAVIUM_OCTEON_2ND_KERNEL
+ octeon_port.line = 0;
+#else
+ octeon_port.line = octeon_uart;
+#endif
+ octeon_port.irq = 42 + octeon_uart;
+ early_serial_setup(&octeon_port);
+
+ octeon_user_io_init();
+ register_smp_ops(&octeon_smp_ops);
+}
+
+void __init plat_mem_setup(void)
+{
+ uint64_t mem_alloc_size;
+ uint64_t total;
+ int64_t memory;
+
+ total = 0;
+
+ /* First add the init memory we will be returning. */
+ memory = __pa_symbol(&__init_begin) & PAGE_MASK;
+ mem_alloc_size = (__pa_symbol(&__init_end) & PAGE_MASK) - memory;
+ if (mem_alloc_size > 0) {
+ add_memory_region(memory, mem_alloc_size, BOOT_MEM_RAM);
+ total += mem_alloc_size;
+ }
+
+ /*
+ * The Mips memory init uses the first memory location for
+ * some memory vectors. When SPARSEMEM is in use, it doesn't
+ * verify that the size is big enough for the final
+ * vectors. Making the smallest chuck 4MB seems to be enough
+ * to consistantly work.
+ */
+ mem_alloc_size = 4 << 20;
+ if (mem_alloc_size > MAX_MEMORY)
+ mem_alloc_size = MAX_MEMORY;
+
+ /*
+ * When allocating memory, we want incrementing addresses from
+ * bootmem_alloc so the code in add_memory_region can merge
+ * regions next to each other.
+ */
+ cvmx_bootmem_lock();
+ while ((boot_mem_map.nr_map < BOOT_MEM_MAP_MAX)
+ && (total < MAX_MEMORY)) {
+#if defined(CONFIG_64BIT) || defined(CONFIG_64BIT_PHYS_ADDR)
+ memory = cvmx_bootmem_phy_alloc(mem_alloc_size,
+ __pa_symbol(&__init_end), -1,
+ 0x100000,
+ CVMX_BOOTMEM_FLAG_NO_LOCKING);
+#elif defined(CONFIG_HIGHMEM)
+ memory = cvmx_bootmem_phy_alloc(mem_alloc_size, 0, 1ull << 31,
+ 0x100000,
+ CVMX_BOOTMEM_FLAG_NO_LOCKING);
+#else
+ memory = cvmx_bootmem_phy_alloc(mem_alloc_size, 0, 512 << 20,
+ 0x100000,
+ CVMX_BOOTMEM_FLAG_NO_LOCKING);
+#endif
+ if (memory >= 0) {
+ /*
+ * This function automatically merges address
+ * regions next to each other if they are
+ * received in incrementing order.
+ */
+ add_memory_region(memory, mem_alloc_size, BOOT_MEM_RAM);
+ total += mem_alloc_size;
+ } else {
+ break;
+ }
+ }
+ cvmx_bootmem_unlock();
+
+#ifdef CONFIG_CAVIUM_RESERVE32
+ /*
+ * Now that we've allocated the kernel memory it is safe to
+ * free the reserved region. We free it here so that builtin
+ * drivers can use the memory.
+ */
+ if (octeon_reserve32_memory)
+ cvmx_bootmem_free_named("CAVIUM_RESERVE32");
+#endif /* CONFIG_CAVIUM_RESERVE32 */
+
+ if (total == 0)
+ panic("Unable to allocate memory from "
+ "cvmx_bootmem_phy_alloc\n");
+}
+
+
+int prom_putchar(char c)
+{
+ uint64_t lsrval;
+
+ /* Spin until there is room */
+ do {
+ lsrval = cvmx_read_csr(CVMX_MIO_UARTX_LSR(octeon_uart));
+ } while ((lsrval & 0x20) == 0);
+
+ /* Write the byte */
+ cvmx_write_csr(CVMX_MIO_UARTX_THR(octeon_uart), c);
+ return 1;
+}
+
+void prom_free_prom_memory(void)
+{
+#ifdef CONFIG_CAVIUM_DECODE_RSL
+ cvmx_interrupt_rsl_enable();
+
+ /* Add an interrupt handler for general failures. */
+ if (request_irq(OCTEON_IRQ_RML, octeon_rlm_interrupt, IRQF_SHARED,
+ "RML/RSL", octeon_rlm_interrupt)) {
+ panic("Unable to request_irq(OCTEON_IRQ_RML)\n");
+ }
+#endif
+
+ /* This call is here so that it is performed after any TLB
+ initializations. It needs to be after these in case the
+ CONFIG_CAVIUM_RESERVE32_USE_WIRED_TLB option is set */
+ octeon_hal_setup_reserved32();
+}
+
+static struct octeon_cf_data octeon_cf_data;
+
+static int __init octeon_cf_device_init(void)
+{
+ union cvmx_mio_boot_reg_cfgx mio_boot_reg_cfg;
+ unsigned long base_ptr, region_base, region_size;
+ struct platform_device *pd;
+ struct resource cf_resources[3];
+ unsigned int num_resources;
+ int i;
+ int ret = 0;
+
+ /* Setup octeon-cf platform device if present. */
+ base_ptr = 0;
+ if (octeon_bootinfo->major_version == 1
+ && octeon_bootinfo->minor_version >= 1) {
+ if (octeon_bootinfo->compact_flash_common_base_addr)
+ base_ptr =
+ octeon_bootinfo->compact_flash_common_base_addr;
+ } else {
+ base_ptr = 0x1d000800;
+ }
+
+ if (!base_ptr)
+ return ret;
+
+ /* Find CS0 region. */
+ for (i = 0; i < 8; i++) {
+ mio_boot_reg_cfg.u64 = cvmx_read_csr(CVMX_MIO_BOOT_REG_CFGX(i));
+ region_base = mio_boot_reg_cfg.s.base << 16;
+ region_size = (mio_boot_reg_cfg.s.size + 1) << 16;
+ if (mio_boot_reg_cfg.s.en && base_ptr >= region_base
+ && base_ptr < region_base + region_size)
+ break;
+ }
+ if (i >= 7) {
+ /* i and i + 1 are CS0 and CS1, both must be less than 8. */
+ goto out;
+ }
+ octeon_cf_data.base_region = i;
+ octeon_cf_data.is16bit = mio_boot_reg_cfg.s.width;
+ octeon_cf_data.base_region_bias = base_ptr - region_base;
+ memset(cf_resources, 0, sizeof(cf_resources));
+ num_resources = 0;
+ cf_resources[num_resources].flags = IORESOURCE_MEM;
+ cf_resources[num_resources].start = region_base;
+ cf_resources[num_resources].end = region_base + region_size - 1;
+ num_resources++;
+
+
+ if (!(base_ptr & 0xfffful)) {
+ /*
+ * Boot loader signals availability of DMA (true_ide
+ * mode) by setting low order bits of base_ptr to
+ * zero.
+ */
+
+ /* Asume that CS1 immediately follows. */
+ mio_boot_reg_cfg.u64 =
+ cvmx_read_csr(CVMX_MIO_BOOT_REG_CFGX(i + 1));
+ region_base = mio_boot_reg_cfg.s.base << 16;
+ region_size = (mio_boot_reg_cfg.s.size + 1) << 16;
+ if (!mio_boot_reg_cfg.s.en)
+ goto out;
+
+ cf_resources[num_resources].flags = IORESOURCE_MEM;
+ cf_resources[num_resources].start = region_base;
+ cf_resources[num_resources].end = region_base + region_size - 1;
+ num_resources++;
+
+ octeon_cf_data.dma_engine = 0;
+ cf_resources[num_resources].flags = IORESOURCE_IRQ;
+ cf_resources[num_resources].start = OCTEON_IRQ_BOOTDMA;
+ cf_resources[num_resources].end = OCTEON_IRQ_BOOTDMA;
+ num_resources++;
+ } else {
+ octeon_cf_data.dma_engine = -1;
+ }
+
+ pd = platform_device_alloc("pata_octeon_cf", -1);
+ if (!pd) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ pd->dev.platform_data = &octeon_cf_data;
+
+ ret = platform_device_add_resources(pd, cf_resources, num_resources);
+ if (ret)
+ goto fail;
+
+ ret = platform_device_add(pd);
+ if (ret)
+ goto fail;
+
+ return ret;
+fail:
+ platform_device_put(pd);
+out:
+ return ret;
+}
+device_initcall(octeon_cf_device_init);
diff --git a/arch/mips/cavium-octeon/smp.c b/arch/mips/cavium-octeon/smp.c
new file mode 100644
index 000000000000..24e0ad63980a
--- /dev/null
+++ b/arch/mips/cavium-octeon/smp.c
@@ -0,0 +1,211 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2004-2008 Cavium Networks
+ */
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/smp.h>
+#include <linux/interrupt.h>
+#include <linux/kernel_stat.h>
+#include <linux/sched.h>
+#include <linux/module.h>
+
+#include <asm/mmu_context.h>
+#include <asm/system.h>
+#include <asm/time.h>
+
+#include <asm/octeon/octeon.h>
+
+volatile unsigned long octeon_processor_boot = 0xff;
+volatile unsigned long octeon_processor_sp;
+volatile unsigned long octeon_processor_gp;
+
+static irqreturn_t mailbox_interrupt(int irq, void *dev_id)
+{
+ const int coreid = cvmx_get_core_num();
+ uint64_t action;
+
+ /* Load the mailbox register to figure out what we're supposed to do */
+ action = cvmx_read_csr(CVMX_CIU_MBOX_CLRX(coreid));
+
+ /* Clear the mailbox to clear the interrupt */
+ cvmx_write_csr(CVMX_CIU_MBOX_CLRX(coreid), action);
+
+ if (action & SMP_CALL_FUNCTION)
+ smp_call_function_interrupt();
+
+ /* Check if we've been told to flush the icache */
+ if (action & SMP_ICACHE_FLUSH)
+ asm volatile ("synci 0($0)\n");
+ return IRQ_HANDLED;
+}
+
+/**
+ * Cause the function described by call_data to be executed on the passed
+ * cpu. When the function has finished, increment the finished field of
+ * call_data.
+ */
+void octeon_send_ipi_single(int cpu, unsigned int action)
+{
+ int coreid = cpu_logical_map(cpu);
+ /*
+ pr_info("SMP: Mailbox send cpu=%d, coreid=%d, action=%u\n", cpu,
+ coreid, action);
+ */
+ cvmx_write_csr(CVMX_CIU_MBOX_SETX(coreid), action);
+}
+
+static inline void octeon_send_ipi_mask(cpumask_t mask, unsigned int action)
+{
+ unsigned int i;
+
+ for_each_cpu_mask(i, mask)
+ octeon_send_ipi_single(i, action);
+}
+
+/**
+ * Detect available CPUs, populate phys_cpu_present_map
+ */
+static void octeon_smp_setup(void)
+{
+ const int coreid = cvmx_get_core_num();
+ int cpus;
+ int id;
+
+ int core_mask = octeon_get_boot_coremask();
+
+ cpus_clear(cpu_possible_map);
+ __cpu_number_map[coreid] = 0;
+ __cpu_logical_map[0] = coreid;
+ cpu_set(0, cpu_possible_map);
+
+ cpus = 1;
+ for (id = 0; id < 16; id++) {
+ if ((id != coreid) && (core_mask & (1 << id))) {
+ cpu_set(cpus, cpu_possible_map);
+ __cpu_number_map[id] = cpus;
+ __cpu_logical_map[cpus] = id;
+ cpus++;
+ }
+ }
+}
+
+/**
+ * Firmware CPU startup hook
+ *
+ */
+static void octeon_boot_secondary(int cpu, struct task_struct *idle)
+{
+ int count;
+
+ pr_info("SMP: Booting CPU%02d (CoreId %2d)...\n", cpu,
+ cpu_logical_map(cpu));
+
+ octeon_processor_sp = __KSTK_TOS(idle);
+ octeon_processor_gp = (unsigned long)(task_thread_info(idle));
+ octeon_processor_boot = cpu_logical_map(cpu);
+ mb();
+
+ count = 10000;
+ while (octeon_processor_sp && count) {
+ /* Waiting for processor to get the SP and GP */
+ udelay(1);
+ count--;
+ }
+ if (count == 0)
+ pr_err("Secondary boot timeout\n");
+}
+
+/**
+ * After we've done initial boot, this function is called to allow the
+ * board code to clean up state, if needed
+ */
+static void octeon_init_secondary(void)
+{
+ const int coreid = cvmx_get_core_num();
+ union cvmx_ciu_intx_sum0 interrupt_enable;
+
+ octeon_check_cpu_bist();
+ octeon_init_cvmcount();
+ /*
+ pr_info("SMP: CPU%d (CoreId %lu) started\n", cpu, coreid);
+ */
+ /* Enable Mailbox interrupts to this core. These are the only
+ interrupts allowed on line 3 */
+ cvmx_write_csr(CVMX_CIU_MBOX_CLRX(coreid), 0xffffffff);
+ interrupt_enable.u64 = 0;
+ interrupt_enable.s.mbox = 0x3;
+ cvmx_write_csr(CVMX_CIU_INTX_EN0((coreid * 2)), interrupt_enable.u64);
+ cvmx_write_csr(CVMX_CIU_INTX_EN0((coreid * 2 + 1)), 0);
+ cvmx_write_csr(CVMX_CIU_INTX_EN1((coreid * 2)), 0);
+ cvmx_write_csr(CVMX_CIU_INTX_EN1((coreid * 2 + 1)), 0);
+ /* Enable core interrupt processing for 2,3 and 7 */
+ set_c0_status(0x8c01);
+}
+
+/**
+ * Callout to firmware before smp_init
+ *
+ */
+void octeon_prepare_cpus(unsigned int max_cpus)
+{
+ cvmx_write_csr(CVMX_CIU_MBOX_CLRX(cvmx_get_core_num()), 0xffffffff);
+ if (request_irq(OCTEON_IRQ_MBOX0, mailbox_interrupt, IRQF_SHARED,
+ "mailbox0", mailbox_interrupt)) {
+ panic("Cannot request_irq(OCTEON_IRQ_MBOX0)\n");
+ }
+ if (request_irq(OCTEON_IRQ_MBOX1, mailbox_interrupt, IRQF_SHARED,
+ "mailbox1", mailbox_interrupt)) {
+ panic("Cannot request_irq(OCTEON_IRQ_MBOX1)\n");
+ }
+}
+
+/**
+ * Last chance for the board code to finish SMP initialization before
+ * the CPU is "online".
+ */
+static void octeon_smp_finish(void)
+{
+#ifdef CONFIG_CAVIUM_GDB
+ unsigned long tmp;
+ /* Pulse MCD0 signal on Ctrl-C to stop all the cores. Also set the MCD0
+ to be not masked by this core so we know the signal is received by
+ someone */
+ asm volatile ("dmfc0 %0, $22\n"
+ "ori %0, %0, 0x9100\n" "dmtc0 %0, $22\n" : "=r" (tmp));
+#endif
+
+ octeon_user_io_init();
+
+ /* to generate the first CPU timer interrupt */
+ write_c0_compare(read_c0_count() + mips_hpt_frequency / HZ);
+}
+
+/**
+ * Hook for after all CPUs are online
+ */
+static void octeon_cpus_done(void)
+{
+#ifdef CONFIG_CAVIUM_GDB
+ unsigned long tmp;
+ /* Pulse MCD0 signal on Ctrl-C to stop all the cores. Also set the MCD0
+ to be not masked by this core so we know the signal is received by
+ someone */
+ asm volatile ("dmfc0 %0, $22\n"
+ "ori %0, %0, 0x9100\n" "dmtc0 %0, $22\n" : "=r" (tmp));
+#endif
+}
+
+struct plat_smp_ops octeon_smp_ops = {
+ .send_ipi_single = octeon_send_ipi_single,
+ .send_ipi_mask = octeon_send_ipi_mask,
+ .init_secondary = octeon_init_secondary,
+ .smp_finish = octeon_smp_finish,
+ .cpus_done = octeon_cpus_done,
+ .boot_secondary = octeon_boot_secondary,
+ .smp_setup = octeon_smp_setup,
+ .prepare_cpus = octeon_prepare_cpus,
+};