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authorThomas Bogendoerfer <tsbogend@alpha.franken.de>2008-01-04 23:31:07 +0100
committerRalf Baechle <ralf@linux-mips.org>2008-01-29 10:14:59 +0000
commit231a35d37293ab88d325a9cb94e5474c156282c0 (patch)
tree75f38d069e5e49de03fb789975b8a102c282b979 /arch/mips/fw/sni
parent237cfee1db66147aef4457f02b56a41e6f84bfd3 (diff)
downloadlinux-231a35d37293ab88d325a9cb94e5474c156282c0.tar.gz
[MIPS] RM: Collected changes
- EISA support for non PCI RMs (RM200 and RM400-xxx). The major part is the splitting of the EISA and onboard ISA of the RM200, which makes the EISA bus on the RM200 look like on other RMs. - 64bit kernel support - system type detection is now common for big and little endian - moved sniprom code to arch/mips/fw - added call_o32 function to arch/mips/fw/lib, which uses a private stack for calling prom functions - fix problem with ISA interrupts, which makes using PIT clockevent possible Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/fw/sni')
-rw-r--r--arch/mips/fw/sni/Makefile5
-rw-r--r--arch/mips/fw/sni/sniprom.c151
2 files changed, 156 insertions, 0 deletions
diff --git a/arch/mips/fw/sni/Makefile b/arch/mips/fw/sni/Makefile
new file mode 100644
index 00000000000..d9740a3788e
--- /dev/null
+++ b/arch/mips/fw/sni/Makefile
@@ -0,0 +1,5 @@
+#
+# Makefile for the SNI prom monitor routines under Linux.
+#
+
+lib-$(CONFIG_SNIPROM) += sniprom.o
diff --git a/arch/mips/fw/sni/sniprom.c b/arch/mips/fw/sni/sniprom.c
new file mode 100644
index 00000000000..96ba9920275
--- /dev/null
+++ b/arch/mips/fw/sni/sniprom.c
@@ -0,0 +1,151 @@
+/*
+ * Big Endian PROM code for SNI RM machines
+ *
+ * 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) 2005-2006 Florian Lohoff (flo@rfc822.org)
+ * Copyright (C) 2005-2006 Thomas Bogendoerfer (tsbogend@alpha.franken.de)
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/string.h>
+#include <linux/console.h>
+
+#include <asm/addrspace.h>
+#include <asm/sni.h>
+#include <asm/mipsprom.h>
+#include <asm/mipsregs.h>
+#include <asm/bootinfo.h>
+
+/* special SNI prom calls */
+/*
+ * This does not exist in all proms - SINIX compares
+ * the prom env variable "version" against "2.0008"
+ * or greater. If lesser it tries to probe interesting
+ * registers
+ */
+#define PROM_GET_MEMCONF 58
+#define PROM_GET_HWCONF 61
+
+#define PROM_VEC (u64 *)CKSEG1ADDR(0x1fc00000)
+#define PROM_ENTRY(x) (PROM_VEC + (x))
+
+#define ___prom_putchar ((int *(*)(int))PROM_ENTRY(PROM_PUTCHAR))
+#define ___prom_getenv ((char *(*)(char *))PROM_ENTRY(PROM_GETENV))
+#define ___prom_get_memconf ((void (*)(void *))PROM_ENTRY(PROM_GET_MEMCONF))
+#define ___prom_get_hwconf ((u32 (*)(void))PROM_ENTRY(PROM_GET_HWCONF))
+
+#ifdef CONFIG_64BIT
+
+static u8 o32_stk[16384];
+#define O32_STK &o32_stk[sizeof(o32_stk)]
+
+#define __PROM_O32(fun, arg) fun arg __asm__(#fun); \
+ __asm__(#fun " = call_o32")
+
+int __PROM_O32(__prom_putchar, (int *(*)(int), void *, int));
+char *__PROM_O32(__prom_getenv, (char *(*)(char *), void *, char *));
+void __PROM_O32(__prom_get_memconf, (void (*)(void *), void *, void *));
+u32 __PROM_O32(__prom_get_hwconf, (u32 (*)(void), void *));
+
+#define _prom_putchar(x) __prom_putchar(___prom_putchar, O32_STK, x)
+#define _prom_getenv(x) __prom_getenv(___prom_getenv, O32_STK, x)
+#define _prom_get_memconf(x) __prom_get_memconf(___prom_get_memconf, O32_STK, x)
+#define _prom_get_hwconf() __prom_get_hwconf(___prom_get_hwconf, O32_STK)
+
+#else
+#define _prom_putchar(x) ___prom_putchar(x)
+#define _prom_getenv(x) ___prom_getenv(x)
+#define _prom_get_memconf(x) ___prom_get_memconf(x)
+#define _prom_get_hwconf(x) ___prom_get_hwconf(x)
+#endif
+
+void prom_putchar(char c)
+{
+ _prom_putchar(c);
+}
+
+
+char *prom_getenv(char *s)
+{
+ return _prom_getenv(s);
+}
+
+void *prom_get_hwconf(void)
+{
+ u32 hwconf = _prom_get_hwconf();
+
+ if (hwconf == 0xffffffff)
+ return NULL;
+
+ return (void *)CKSEG1ADDR(hwconf);
+}
+
+void __init prom_free_prom_memory(void)
+{
+}
+
+/*
+ * /proc/cpuinfo system type
+ *
+ */
+char *system_type = "Unknown";
+const char *get_system_type(void)
+{
+ return system_type;
+}
+
+static void __init sni_mem_init(void)
+{
+ int i, memsize;
+ struct membank {
+ u32 size;
+ u32 base;
+ u32 size2;
+ u32 pad1;
+ u32 pad2;
+ } memconf[8];
+ int brd_type = *(unsigned char *)SNI_IDPROM_BRDTYPE;
+
+
+ /* MemSIZE from prom in 16MByte chunks */
+ memsize = *((unsigned char *) SNI_IDPROM_MEMSIZE) * 16;
+
+ pr_debug("IDProm memsize: %u MByte\n", memsize);
+
+ /* get memory bank layout from prom */
+ _prom_get_memconf(&memconf);
+
+ pr_debug("prom_get_mem_conf memory configuration:\n");
+ for (i = 0; i < 8 && memconf[i].size; i++) {
+ if (brd_type == SNI_BRD_PCI_TOWER ||
+ brd_type == SNI_BRD_PCI_TOWER_CPLUS) {
+ if (memconf[i].base >= 0x20000000 &&
+ memconf[i].base < 0x30000000)
+ memconf[i].base -= 0x20000000;
+ }
+ pr_debug("Bank%d: %08x @ %08x\n", i,
+ memconf[i].size, memconf[i].base);
+ add_memory_region(memconf[i].base, memconf[i].size,
+ BOOT_MEM_RAM);
+ }
+}
+
+void __init prom_init(void)
+{
+ int argc = fw_arg0;
+ u32 *argv = (u32 *)CKSEG0ADDR(fw_arg1);
+ int i;
+
+ sni_mem_init();
+
+ /* copy prom cmdline parameters to kernel cmdline */
+ for (i = 1; i < argc; i++) {
+ strcat(arcs_cmdline, (char *)CKSEG0ADDR(argv[i]));
+ if (i < (argc - 1))
+ strcat(arcs_cmdline, " ");
+ }
+}