diff options
author | Denys Dmytriyenko <denis@denix.org> | 2009-03-17 14:32:59 -0400 |
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committer | Denys Dmytriyenko <denis@denix.org> | 2009-03-17 14:32:59 -0400 |
commit | 709c4d66e0b107ca606941b988bad717c0b45d9b (patch) | |
tree | 37ee08b1eb308f3b2b6426d5793545c38396b838 /recipes/linux/linux-omap-pm/cache-display-fix.patch | |
parent | fa6cd5a3b993f16c27de4ff82b42684516d433ba (diff) |
rename packages/ to recipes/ per earlier agreement
See links below for more details:
http://thread.gmane.org/gmane.comp.handhelds.openembedded/21326
http://thread.gmane.org/gmane.comp.handhelds.openembedded/21816
Signed-off-by: Denys Dmytriyenko <denis@denix.org>
Acked-by: Mike Westerhof <mwester@dls.net>
Acked-by: Philip Balister <philip@balister.org>
Acked-by: Khem Raj <raj.khem@gmail.com>
Acked-by: Marcin Juszkiewicz <hrw@openembedded.org>
Acked-by: Koen Kooi <koen@openembedded.org>
Acked-by: Frans Meulenbroeks <fransmeulenbroeks@gmail.com>
Diffstat (limited to 'recipes/linux/linux-omap-pm/cache-display-fix.patch')
-rw-r--r-- | recipes/linux/linux-omap-pm/cache-display-fix.patch | 238 |
1 files changed, 238 insertions, 0 deletions
diff --git a/recipes/linux/linux-omap-pm/cache-display-fix.patch b/recipes/linux/linux-omap-pm/cache-display-fix.patch new file mode 100644 index 0000000000..019fd5acf1 --- /dev/null +++ b/recipes/linux/linux-omap-pm/cache-display-fix.patch @@ -0,0 +1,238 @@ +On Tue, 2008-07-01 at 06:23 +0100, Dirk Behme wrote: +> Catalin Marinas wrote: +> > But, anyway, if you want a patch, Harry is updating it to a recent +> > kernel. +> +> Any news on this? I think there are some people wanting a patch ;) + +See below for a preliminary patch updated to 2.6.26-rc8. Note that I +don't plan to submit it in its current form but clean it up a bit first. + + +Show the cache type of ARMv7 CPUs + +From: Catalin Marinas <catalin.marinas@arm.com> + +Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> +--- + + arch/arm/kernel/setup.c | 137 +++++++++++++++++++++++++++++++++++++++++++++- + include/asm-arm/system.h | 18 ++++++ + 2 files changed, 153 insertions(+), 2 deletions(-) + + +diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c +index 5ae0eb2..0cd238d 100644 +--- a/arch/arm/kernel/setup.c ++++ b/arch/arm/kernel/setup.c +@@ -256,6 +256,24 @@ static const char *proc_arch[] = { + "?(17)", + }; + ++static const char *v7_cache_policy[4] = { ++ "reserved", ++ "AVIVT", ++ "VIPT", ++ "PIPT", ++}; ++ ++static const char *v7_cache_type[8] = { ++ "none", ++ "instruction only", ++ "data only", ++ "separate instruction and data", ++ "unified", ++ "unknown type", ++ "unknown type", ++ "unknown type", ++}; ++ + #define CACHE_TYPE(x) (((x) >> 25) & 15) + #define CACHE_S(x) ((x) & (1 << 24)) + #define CACHE_DSIZE(x) (((x) >> 12) & 4095) /* only if S=1 */ +@@ -266,6 +284,22 @@ static const char *proc_arch[] = { + #define CACHE_M(y) ((y) & (1 << 2)) + #define CACHE_LINE(y) ((y) & 3) + ++#define CACHE_TYPE_V7(x) (((x) >> 14) & 3) ++#define CACHE_UNIFIED(x) ((((x) >> 27) & 7)+1) ++#define CACHE_COHERENT(x) ((((x) >> 24) & 7)+1) ++ ++#define CACHE_ID_LEVEL_MASK 7 ++#define CACHE_ID_LEVEL_BITS 3 ++ ++#define CACHE_LINE_V7(v) ((1 << (((v) & 7)+4))) ++#define CACHE_ASSOC_V7(v) ((((v) >> 3) & ((1<<10)-1))+1) ++#define CACHE_SETS_V7(v) ((((v) >> 13) & ((1<<15)-1))+1) ++#define CACHE_SIZE_V7(v) (CACHE_LINE_V7(v)*CACHE_ASSOC_V7(v)*CACHE_SETS_V7(v)) ++#define CACHE_WA_V7(v) (((v) & (1<<28)) != 0) ++#define CACHE_RA_V7(v) (((v) & (1<<29)) != 0) ++#define CACHE_WB_V7(v) (((v) & (1<<30)) != 0) ++#define CACHE_WT_V7(v) (((v) & (1<<31)) != 0) ++ + static inline void dump_cache(const char *prefix, int cpu, unsigned int cache) + { + unsigned int mult = 2 + (CACHE_M(cache) ? 1 : 0); +@@ -279,11 +313,57 @@ static inline void dump_cache(const char *prefix, int cpu, unsigned int cache) + CACHE_LINE(cache))); + } + ++static void dump_v7_cache(const char *type, int cpu, unsigned int level) ++{ ++ unsigned int cachesize; ++ ++ write_extended_cpuid(2,0,0,0,level); /* Set the cache size selection register */ ++ write_extended_cpuid(0,7,5,4,0); /* Prefetch flush to wait for above */ ++ cachesize = read_extended_cpuid(1,0,0,0); ++ ++ printk("CPU%u: %s cache: %d bytes, associativity %d, %d byte lines, %d sets,\n supports%s%s%s%s\n", ++ cpu, type, ++ CACHE_SIZE_V7(cachesize),CACHE_ASSOC_V7(cachesize), ++ CACHE_LINE_V7(cachesize),CACHE_SETS_V7(cachesize), ++ CACHE_WA_V7(cachesize) ? " WA" : "", ++ CACHE_RA_V7(cachesize) ? " RA" : "", ++ CACHE_WB_V7(cachesize) ? " WB" : "", ++ CACHE_WT_V7(cachesize) ? " WT" : ""); ++} ++ + static void __init dump_cpu_info(int cpu) + { + unsigned int info = read_cpuid(CPUID_CACHETYPE); + +- if (info != processor_id) { ++ if (info != processor_id && (info & (1 << 31))) { ++ /* ARMv7 style of cache info register */ ++ unsigned int id = read_extended_cpuid(1,0,0,1); ++ unsigned int level = 0; ++ printk("CPU%u: L1 I %s cache. Caches unified at level %u, coherent at level %u\n", ++ cpu, ++ v7_cache_policy[CACHE_TYPE_V7(info)], ++ CACHE_UNIFIED(id), ++ CACHE_COHERENT(id)); ++ ++ while (id & CACHE_ID_LEVEL_MASK) { ++ printk("CPU%u: Level %u cache is %s\n", ++ cpu, (level >> 1)+1, v7_cache_type[id & CACHE_ID_LEVEL_MASK]); ++ ++ if (id & 1) { ++ /* Dump I at this level */ ++ dump_v7_cache("I", cpu, level | 1); ++ } ++ ++ if (id & (4 | 2)) { ++ /* Dump D or unified at this level */ ++ dump_v7_cache((id & 4) ? "unified" : "D", cpu, level); ++ } ++ ++ /* Next level out */ ++ level += 2; ++ id >>= CACHE_ID_LEVEL_BITS; ++ } ++ } else if (info != processor_id) { + printk("CPU%u: D %s %s cache\n", cpu, cache_is_vivt() ? "VIVT" : "VIPT", + cache_types[CACHE_TYPE(info)]); + if (CACHE_S(info)) { +@@ -916,6 +996,30 @@ c_show_cache(struct seq_file *m, const char *type, unsigned int cache) + CACHE_LINE(cache))); + } + ++static void c_show_v7_cache(struct seq_file *m, const char *type, unsigned int levelselect) ++{ ++ unsigned int cachesize; ++ unsigned int level = (levelselect >> 1) + 1; ++ ++ write_extended_cpuid(2,0,0,0,levelselect); /* Set the cache size selection register */ ++ write_extended_cpuid(0,7,5,4,0); /* Prefetch flush to wait for above */ ++ cachesize = read_extended_cpuid(1,0,0,0); ++ ++ seq_printf(m, "L%u %s size\t\t: %d bytes\n" ++ "L%u %s assoc\t\t: %d\n" ++ "L%u %s line length\t: %d\n" ++ "L%u %s sets\t\t: %d\n" ++ "L%u %s supports\t\t:%s%s%s%s\n", ++ level, type, CACHE_SIZE_V7(cachesize), ++ level, type, CACHE_ASSOC_V7(cachesize), ++ level, type, CACHE_LINE_V7(cachesize), ++ level, type, CACHE_SETS_V7(cachesize), ++ level, type, CACHE_WA_V7(cachesize) ? " WA" : "", ++ CACHE_RA_V7(cachesize) ? " RA" : "", ++ CACHE_WB_V7(cachesize) ? " WB" : "", ++ CACHE_WT_V7(cachesize) ? " WT" : ""); ++} ++ + static int c_show(struct seq_file *m, void *v) + { + int i; +@@ -971,7 +1075,36 @@ static int c_show(struct seq_file *m, void *v) + + { + unsigned int cache_info = read_cpuid(CPUID_CACHETYPE); +- if (cache_info != processor_id) { ++ if (cache_info != processor_id && (cache_info & (1<<31))) { ++ /* V7 style of cache info register */ ++ unsigned int id = read_extended_cpuid(1,0,0,1); ++ unsigned int levelselect = 0; ++ seq_printf(m, "L1 I cache\t:%s\n" ++ "Cache unification level\t: %u\n" ++ "Cache coherency level\t: %u\n", ++ v7_cache_policy[CACHE_TYPE_V7(cache_info)], ++ CACHE_UNIFIED(id), ++ CACHE_COHERENT(id)); ++ ++ while (id & CACHE_ID_LEVEL_MASK) { ++ seq_printf(m, "Level %u cache\t\t: %s\n", ++ (levelselect >> 1)+1, v7_cache_type[id & CACHE_ID_LEVEL_MASK]); ++ ++ if (id & 1) { ++ /* Dump I at this level */ ++ c_show_v7_cache(m, "I", levelselect | 1); ++ } ++ ++ if (id & (4 | 2)) { ++ /* Dump D or unified at this level */ ++ c_show_v7_cache(m, (id & 4) ? "cache" : "D", levelselect); ++ } ++ ++ /* Next level out */ ++ levelselect += 2; ++ id >>= CACHE_ID_LEVEL_BITS; ++ } ++ } else if (cache_info != processor_id) { + seq_printf(m, "Cache type\t: %s\n" + "Cache clean\t: %s\n" + "Cache lockdown\t: %s\n" +diff --git a/arch/arm/include/asm/system.h b/arch/arm/include/asm/system.h +index 514af79..704738e 100644 +--- a/arch/arm/include/asm/system.h ++++ b/arch/arm/include/asm/system.h +@@ -74,6 +74,24 @@ + : "cc"); \ + __val; \ + }) ++#define read_extended_cpuid(op1,op2,op3,op4) \ ++ ({ \ ++ unsigned int __val; \ ++ asm("mrc p15," __stringify(op1) ",%0,c" __stringify(op2)",c" __stringify(op3)"," __stringify(op4) \ ++ : "=r" (__val) \ ++ : \ ++ : "cc"); \ ++ __val; \ ++ }) ++ ++#define write_extended_cpuid(op1,op2,op3,op4,v) \ ++ ({ \ ++ unsigned int __val = v; \ ++ asm("mcr p15," __stringify(op1) ",%0,c" __stringify(op2)",c" __stringify(op3)"," __stringify(op4) \ ++ : \ ++ : "r" (__val) \ ++ : "cc"); \ ++ }) + #else + extern unsigned int processor_id; + #define read_cpuid(reg) (processor_id) + + +-- +Catalin + + |