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ARC: cacheflush refactor #2: I and D caches lines to have same size 

Having them be different seems an obscure configuration.

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
This commit is contained in:
Vineet Gupta 2013-09-05 13:17:49 +05:30
parent f3e4de3274
commit 63d2dfdbf4
2 changed files with 16 additions and 22 deletions
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8
arch/arc/include/asm/cache.h
View File

@ -17,13 +17,7 @@
#endif
#define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT)
/* For a rare case where customers have differently config I/D */
#define ARC_ICACHE_LINE_LEN L1_CACHE_BYTES
#define ARC_DCACHE_LINE_LEN L1_CACHE_BYTES
#define ICACHE_LINE_MASK (~(ARC_ICACHE_LINE_LEN - 1))
#define DCACHE_LINE_MASK (~(ARC_DCACHE_LINE_LEN - 1))
#define CACHE_LINE_MASK (~(L1_CACHE_BYTES - 1))
/*
* ARC700 doesn't cache any access in top 256M.

30
arch/arc/mm/cache_arc700.c
View File

@ -182,7 +182,7 @@ void arc_cache_init(void)
#ifdef CONFIG_ARC_HAS_ICACHE
/* 1. Confirm some of I-cache params which Linux assumes */
if (ic->line_len != ARC_ICACHE_LINE_LEN)
if (ic->line_len != L1_CACHE_BYTES)
panic("Cache H/W doesn't match kernel Config");
if (ic->ver != CONFIG_ARC_MMU_VER)
@ -205,7 +205,7 @@ void arc_cache_init(void)
return;
#ifdef CONFIG_ARC_HAS_DCACHE
if (dc->line_len != ARC_DCACHE_LINE_LEN)
if (dc->line_len != L1_CACHE_BYTES)
panic("Cache H/W doesn't match kernel Config");
/* check for D-Cache aliasing */
@ -298,7 +298,7 @@ static inline void __dc_entire_op(const int cacheop)
static inline void __dc_line_loop(unsigned long paddr, unsigned long vaddr,
unsigned long sz, const int cacheop)
{
/* which MMU cmd: INV (discard or wback-n-discard) OR FLUSH (wback) */
/* d$ cmd: INV (discard or wback-n-discard) OR FLUSH (wback) */
const int aux = cacheop & OP_INV ? ARC_REG_DC_IVDL : ARC_REG_DC_FLDL;
int num_lines;
@ -309,12 +309,12 @@ static inline void __dc_line_loop(unsigned long paddr, unsigned long vaddr,
* -@sz will be integral multiple of line size (being page sized).
*/
if (!(__builtin_constant_p(sz) && sz == PAGE_SIZE)) {
sz += paddr & ~DCACHE_LINE_MASK;
paddr &= DCACHE_LINE_MASK;
vaddr &= DCACHE_LINE_MASK;
sz += paddr & ~CACHE_LINE_MASK;
paddr &= CACHE_LINE_MASK;
vaddr &= CACHE_LINE_MASK;
}
num_lines = DIV_ROUND_UP(sz, ARC_DCACHE_LINE_LEN);
num_lines = DIV_ROUND_UP(sz, L1_CACHE_BYTES);
#if (CONFIG_ARC_MMU_VER <= 2)
paddr |= (vaddr >> PAGE_SHIFT) & 0x1F;
@ -329,12 +329,12 @@ static inline void __dc_line_loop(unsigned long paddr, unsigned long vaddr,
write_aux_reg(ARC_REG_DC_PTAG, paddr);
write_aux_reg(aux, vaddr);
vaddr += ARC_DCACHE_LINE_LEN;
vaddr += L1_CACHE_BYTES;
#else
/* paddr contains stuffed vaddrs bits */
write_aux_reg(aux, paddr);
#endif
paddr += ARC_DCACHE_LINE_LEN;
paddr += L1_CACHE_BYTES;
}
}
@ -443,12 +443,12 @@ static void __ic_line_inv_vaddr(unsigned long paddr, unsigned long vaddr,
* -@sz will be integral multiple of line size (being page sized).
*/
if (!(__builtin_constant_p(sz) && sz == PAGE_SIZE)) {
sz += paddr & ~ICACHE_LINE_MASK;
paddr &= ICACHE_LINE_MASK;
vaddr &= ICACHE_LINE_MASK;
sz += paddr & ~CACHE_LINE_MASK;
paddr &= CACHE_LINE_MASK;
vaddr &= CACHE_LINE_MASK;
}
num_lines = DIV_ROUND_UP(sz, ARC_ICACHE_LINE_LEN);
num_lines = DIV_ROUND_UP(sz, L1_CACHE_BYTES);
#if (CONFIG_ARC_MMU_VER <= 2)
/* bits 17:13 of vaddr go as bits 4:0 of paddr */
@ -463,12 +463,12 @@ static void __ic_line_inv_vaddr(unsigned long paddr, unsigned long vaddr,
/* index bits come from vaddr */
write_aux_reg(ARC_REG_IC_IVIL, vaddr);
vaddr += ARC_ICACHE_LINE_LEN;
vaddr += L1_CACHE_BYTES;
#else
/* paddr contains stuffed vaddrs bits */
write_aux_reg(ARC_REG_IC_IVIL, paddr);
#endif
paddr += ARC_ICACHE_LINE_LEN;
paddr += L1_CACHE_BYTES;
}
local_irq_restore(flags);
}