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Blackfin: don't attempt to flush on-chip L1 SRAM regions

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Since the on-chip L1 regions are not cacheable, there is no point in
trying to flush/invalidate them.  Plus, older Blackfin parts like to
trigger an exception (like BF533-0.3).

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Sonic Zhang 2009-06-30 09:48:03 +00:00 committed by Mike Frysinger
parent 73ecfcf908
commit bc6b92f8c3
1 changed files with 18 additions and 5 deletions
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23
arch/blackfin/include/asm/cacheflush.h
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@ -39,8 +39,13 @@ extern void blackfin_invalidate_entire_icache(void);
static inline void flush_icache_range(unsigned start, unsigned end)
{
#if defined(CONFIG_BFIN_EXTMEM_WRITEBACK) || defined(CONFIG_BFIN_L2_WRITEBACK)
blackfin_dcache_flush_range(start, end);
#if defined(CONFIG_BFIN_EXTMEM_WRITEBACK)
if (end <= physical_mem_end)
blackfin_dcache_flush_range(start, end);
#endif
#if defined(CONFIG_BFIN_L2_WRITEBACK)
if (start >= L2_START && end <= L2_START + L2_LENGTH)
blackfin_dcache_flush_range(start, end);
#endif
/* Make sure all write buffers in the data side of the core
@ -52,9 +57,17 @@ static inline void flush_icache_range(unsigned start, unsigned end)
* the pipeline.
*/
SSYNC();
#if defined(CONFIG_BFIN_ICACHE)
blackfin_icache_flush_range(start, end);
flush_icache_range_others(start, end);
#if defined(CONFIG_BFIN_EXTMEM_ICACHEABLE)
if (end <= physical_mem_end) {
blackfin_icache_flush_range(start, end);
flush_icache_range_others(start, end);
}
#endif
#if defined(CONFIG_BFIN_L2_ICACHEABLE)
if (start >= L2_START && end <= L2_START + L2_LENGTH) {
blackfin_icache_flush_range(start, end);
flush_icache_range_others(start, end);
}
#endif
}