aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-06 10:29:33 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-06 10:29:33 -0700
commitdadde13ad86bf45bc71f0663a6ce3dfe5dd4ecc5 (patch)
tree8dd0a19bc2fd65e05fe7678babbd9a95e53d727b
parent23c1fb52961bc24bd3a8078eefc49eed533b2b38 (diff)
parent4b3e975e4a06f1710693c5aa51b8f98facfa9863 (diff)
downloadlinux-stericsson-dadde13ad86bf45bc71f0663a6ce3dfe5dd4ecc5.tar.gz
Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus
* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus: [MIPS] Fix scheduling latency issue on 24K, 34K and 74K cores [MIPS] Add macros to encode processor revisions. [MIPS] RM7000: Enable ICACHE_REFILLS_WORKAROUND_WAR. [MIPS] SMTC: Fix cut'n'paste bug in Kconfig.debug [MIPS] Change libgcc-style functions from lib-y to obj-y [MIPS] Fix timer/performance interrupt detection [MIPS] AP/SP: Avoid triggering the 34K E125 performance issue [MIPS] 64-bit TO_PHYS_MASK macro for RM9000 processors
-rw-r--r--arch/mips/Kconfig.debug2
-rw-r--r--arch/mips/kernel/cpu-probe.c15
-rw-r--r--arch/mips/kernel/traps.c8
-rw-r--r--arch/mips/kernel/vpe.c4
-rw-r--r--arch/mips/lib/Makefile2
-rw-r--r--include/asm-mips/addrspace.h1
-rw-r--r--include/asm-mips/cpu.h11
-rw-r--r--include/asm-mips/mipsregs.h2
-rw-r--r--include/asm-mips/war.h18
9 files changed, 44 insertions, 19 deletions
diff --git a/arch/mips/Kconfig.debug b/arch/mips/Kconfig.debug
index 72d5c198e790..3efe117721aa 100644
--- a/arch/mips/Kconfig.debug
+++ b/arch/mips/Kconfig.debug
@@ -37,7 +37,7 @@ config DEBUG_STACK_USAGE
This option will slow down process creation somewhat.
-config CONFIG_SMTC_IDLE_HOOK_DEBUG
+config SMTC_IDLE_HOOK_DEBUG
bool "Enable additional debug checks before going into CPU idle loop"
depends on DEBUG_KERNEL && MIPS_MT_SMTC
help
diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index 0fc90ba16ae1..b12eeee0e974 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -137,13 +137,24 @@ static inline void check_wait(void)
case CPU_4KEC:
case CPU_4KSC:
case CPU_5KC:
- case CPU_24K:
case CPU_25KF:
+ case CPU_PR4450:
+ cpu_wait = r4k_wait;
+ break;
+
+ case CPU_24K:
case CPU_34K:
+ cpu_wait = r4k_wait;
+ if (read_c0_config7() & MIPS_CONF7_WII)
+ cpu_wait = r4k_wait_irqoff;
+ break;
+
case CPU_74K:
- case CPU_PR4450:
cpu_wait = r4k_wait;
+ if ((c->processor_id & 0xff) >= PRID_REV_ENCODE_332(2, 1, 0))
+ cpu_wait = r4k_wait_irqoff;
break;
+
case CPU_TX49XX:
cpu_wait = r4k_wait_irqoff;
break;
diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index b1233644fcca..3ea7863c4519 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -1372,12 +1372,12 @@ void __init per_cpu_trap_init(void)
*/
if (cpu_has_mips_r2) {
cp0_compare_irq = (read_c0_intctl () >> 29) & 7;
- cp0_perfcount_irq = -1;
- } else {
- cp0_compare_irq = CP0_LEGACY_COMPARE_IRQ;
cp0_perfcount_irq = (read_c0_intctl () >> 26) & 7;
- if (cp0_perfcount_irq != cp0_compare_irq)
+ if (cp0_perfcount_irq == cp0_compare_irq)
cp0_perfcount_irq = -1;
+ } else {
+ cp0_compare_irq = CP0_LEGACY_COMPARE_IRQ;
+ cp0_perfcount_irq = -1;
}
#ifdef CONFIG_MIPS_MT_SMTC
diff --git a/arch/mips/kernel/vpe.c b/arch/mips/kernel/vpe.c
index c9ee9d2d5856..9e66354dee8b 100644
--- a/arch/mips/kernel/vpe.c
+++ b/arch/mips/kernel/vpe.c
@@ -1436,10 +1436,6 @@ static int __init vpe_module_init(void)
write_vpe_c0_vpecontrol(read_vpe_c0_vpecontrol() & ~VPECONTROL_TE);
if (i != 0) {
- write_vpe_c0_status((read_c0_status() &
- ~(ST0_IM | ST0_IE | ST0_KSU))
- | ST0_CU0);
-
/*
* Set config to be the same as vpe0,
* particularly kseg0 coherency alg
diff --git a/arch/mips/lib/Makefile b/arch/mips/lib/Makefile
index 5dad13efba7e..1c1aa9f92f6c 100644
--- a/arch/mips/lib/Makefile
+++ b/arch/mips/lib/Makefile
@@ -9,4 +9,4 @@ obj-y += iomap.o
obj-$(CONFIG_PCI) += iomap-pci.o
# libgcc-style stuff needed in the kernel
-lib-y += ashldi3.o ashrdi3.o lshrdi3.o ucmpdi2.o
+obj-y += ashldi3.o ashrdi3.o lshrdi3.o ucmpdi2.o
diff --git a/include/asm-mips/addrspace.h b/include/asm-mips/addrspace.h
index c6275088cf65..964c5eddc21b 100644
--- a/include/asm-mips/addrspace.h
+++ b/include/asm-mips/addrspace.h
@@ -133,6 +133,7 @@
|| defined (CONFIG_CPU_R4X00) \
|| defined (CONFIG_CPU_R5000) \
|| defined (CONFIG_CPU_RM7000) \
+ || defined (CONFIG_CPU_RM9000) \
|| defined (CONFIG_CPU_NEVADA) \
|| defined (CONFIG_CPU_TX49XX) \
|| defined (CONFIG_CPU_MIPS64)
diff --git a/include/asm-mips/cpu.h b/include/asm-mips/cpu.h
index d38fdbf845b2..2924069075e0 100644
--- a/include/asm-mips/cpu.h
+++ b/include/asm-mips/cpu.h
@@ -125,6 +125,17 @@
#define PRID_REV_VR4130 0x0080
/*
+ * Older processors used to encode processor version and revision in two
+ * 4-bit bitfields, the 4K seems to simply count up and even newer MTI cores
+ * have switched to use the 8-bits as 3:3:2 bitfield with the last field as
+ * the patch number. *ARGH*
+ */
+#define PRID_REV_ENCODE_44(ver, rev) \
+ ((ver) << 4 | (rev))
+#define PRID_REV_ENCODE_332(ver, rev, patch) \
+ ((ver) << 5 | (rev) << 2 | (patch))
+
+/*
* FPU implementation/revision register (CP1 control register 0).
*
* +---------------------------------+----------------+----------------+
diff --git a/include/asm-mips/mipsregs.h b/include/asm-mips/mipsregs.h
index 9985cb7c16e7..89c81922d47c 100644
--- a/include/asm-mips/mipsregs.h
+++ b/include/asm-mips/mipsregs.h
@@ -534,6 +534,8 @@
#define MIPS_CONF3_LPA (_ULCAST_(1) << 7)
#define MIPS_CONF3_DSP (_ULCAST_(1) << 10)
+#define MIPS_CONF7_WII (_ULCAST_(1) << 31)
+
/*
* Bits in the MIPS32/64 coprocessor 1 (FPU) revision register.
*/
diff --git a/include/asm-mips/war.h b/include/asm-mips/war.h
index 13a3502eef44..ec0eeebd8802 100644
--- a/include/asm-mips/war.h
+++ b/include/asm-mips/war.h
@@ -177,18 +177,22 @@
#endif
/*
- * The RM9000 has a bug (though PMC-Sierra opposes it being called that)
- * where invalid instructions in the same I-cache line worth of instructions
- * being fetched may case spurious exceptions.
- */
-#if defined(CONFIG_MOMENCO_JAGUAR_ATX) || defined(CONFIG_MOMENCO_OCELOT_3) || \
- defined(CONFIG_PMC_YOSEMITE) || defined(CONFIG_BASLER_EXCITE)
+ * The RM7000 processors and the E9000 cores have a bug (though PMC-Sierra
+ * opposes it being called that) where invalid instructions in the same
+ * I-cache line worth of instructions being fetched may case spurious
+ * exceptions.
+ */
+#if defined(CONFIG_BASLER_EXCITE) || defined(CONFIG_MOMENCO_JAGUAR_ATX) || \
+ defined(CONFIG_MIPS_ATLAS) || defined(CONFIG_MIPS_MALTA) || \
+ defined(CONFIG_MOMENCO_OCELOT) || defined(CONFIG_MOMENCO_OCELOT_3) || \
+ defined(CONFIG_MOMENCO_OCELOT_C) || defined(CONFIG_PMC_YOSEMITE) || \
+ defined(CONFIG_SGI_IP32) || defined(CONFIG_WR_PPMC)
#define ICACHE_REFILLS_WORKAROUND_WAR 1
#endif
/*
- * ON the R10000 upto version 2.6 (not sure about 2.7) there is a bug that
+ * On the R10000 upto version 2.6 (not sure about 2.7) there is a bug that
* may cause ll / sc and lld / scd sequences to execute non-atomically.
*/
#ifdef CONFIG_SGI_IP27