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authorVineet Gupta <vgupta@synopsys.com>2016-12-19 20:24:08 +0100
committerVineet Gupta <vgupta@synopsys.com>2016-12-19 20:54:41 +0100
commitf64915be2d8c629e7b55ad37f90bd8db2713426e (patch)
treeac9446e343088fa29b48c777bcc4f9b5500d13f3 /arch/arc
parentARC: enable SG chaining (diff)
downloadlinux-f64915be2d8c629e7b55ad37f90bd8db2713426e.tar.xz
linux-f64915be2d8c629e7b55ad37f90bd8db2713426e.zip
ARC: mm: No need to save cache version in @cpuinfo
Historical MMU revisions have been paired with Cache revision updates which are captured in MMU and Cache Build Configuration Registers respectively. This was used in boot code to check for configurations mismatches, speically in simulations (such as running with non existent caches, non pairing MMU and Cache version etc). This can instead be inferred from other cache params such as line size. So remove @ver from post processed @cpuinfo which could be used later to save soem other interesting info. Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc')
-rw-r--r--arch/arc/include/asm/arcregs.h2
-rw-r--r--arch/arc/mm/cache.c15
2 files changed, 5 insertions, 12 deletions
diff --git a/arch/arc/include/asm/arcregs.h b/arch/arc/include/asm/arcregs.h
index da41a54ea2d7..f659942744de 100644
--- a/arch/arc/include/asm/arcregs.h
+++ b/arch/arc/include/asm/arcregs.h
@@ -244,7 +244,7 @@ struct cpuinfo_arc_mmu {
};
struct cpuinfo_arc_cache {
- unsigned int sz_k:14, line_len:8, assoc:4, ver:4, alias:1, vipt:1;
+ unsigned int sz_k:14, line_len:8, assoc:4, alias:1, vipt:1, pad:4;
};
struct cpuinfo_arc_bpu {
diff --git a/arch/arc/mm/cache.c b/arch/arc/mm/cache.c
index 50d71695cd4e..a0ce8ff1e59c 100644
--- a/arch/arc/mm/cache.c
+++ b/arch/arc/mm/cache.c
@@ -40,7 +40,7 @@ char *arc_cache_mumbojumbo(int c, char *buf, int len)
struct cpuinfo_arc_cache *p;
#define PR_CACHE(p, cfg, str) \
- if (!(p)->ver) \
+ if (!(p)->line_len) \
n += scnprintf(buf + n, len - n, str"\t\t: N/A\n"); \
else \
n += scnprintf(buf + n, len - n, \
@@ -54,7 +54,7 @@ char *arc_cache_mumbojumbo(int c, char *buf, int len)
PR_CACHE(&cpuinfo_arc700[c].dcache, CONFIG_ARC_HAS_DCACHE, "D-Cache");
p = &cpuinfo_arc700[c].slc;
- if (p->ver)
+ if (p->line_len)
n += scnprintf(buf + n, len - n,
"SLC\t\t: %uK, %uB Line%s\n",
p->sz_k, p->line_len, IS_USED_RUN(slc_enable));
@@ -104,7 +104,6 @@ static void read_decode_cache_bcr_arcv2(int cpu)
READ_BCR(ARC_REG_SLC_BCR, sbcr);
if (sbcr.ver) {
READ_BCR(ARC_REG_SLC_CFG, slc_cfg);
- p_slc->ver = sbcr.ver;
p_slc->sz_k = 128 << slc_cfg.sz;
l2_line_sz = p_slc->line_len = (slc_cfg.lsz == 0) ? 128 : 64;
}
@@ -152,7 +151,6 @@ void read_decode_cache_bcr(void)
p_ic->line_len = 8 << ibcr.line_len;
p_ic->sz_k = 1 << (ibcr.sz - 1);
- p_ic->ver = ibcr.ver;
p_ic->vipt = 1;
p_ic->alias = p_ic->sz_k/p_ic->assoc/TO_KB(PAGE_SIZE) > 1;
@@ -176,7 +174,6 @@ dc_chk:
p_dc->line_len = 16 << dbcr.line_len;
p_dc->sz_k = 1 << (dbcr.sz - 1);
- p_dc->ver = dbcr.ver;
slc_chk:
if (is_isa_arcv2())
@@ -945,17 +942,13 @@ void arc_cache_init(void)
if (IS_ENABLED(CONFIG_ARC_HAS_ICACHE)) {
struct cpuinfo_arc_cache *ic = &cpuinfo_arc700[cpu].icache;
- if (!ic->ver)
+ if (!ic->line_len)
panic("cache support enabled but non-existent cache\n");
if (ic->line_len != L1_CACHE_BYTES)
panic("ICache line [%d] != kernel Config [%d]",
ic->line_len, L1_CACHE_BYTES);
- if (ic->ver != CONFIG_ARC_MMU_VER)
- panic("Cache ver [%d] doesn't match MMU ver [%d]\n",
- ic->ver, CONFIG_ARC_MMU_VER);
-
/*
* In MMU v4 (HS38x) the aliasing icache config uses IVIL/PTAG
* pair to provide vaddr/paddr respectively, just as in MMU v3
@@ -969,7 +962,7 @@ void arc_cache_init(void)
if (IS_ENABLED(CONFIG_ARC_HAS_DCACHE)) {
struct cpuinfo_arc_cache *dc = &cpuinfo_arc700[cpu].dcache;
- if (!dc->ver)
+ if (!dc->line_len)
panic("cache support enabled but non-existent cache\n");
if (dc->line_len != L1_CACHE_BYTES)