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[MIPS] Initialize S-cache function pointers even on S-cache-less CPUs. 

When a CPU has no scache, the scache flushing functions currently
aren't getting initialized and the NULL pointer is eventually called
as a function.  Initialize the scache flushing functions as a noop
when there's no scache.
    
Initial patch by me and most of the debugging done by Martin Michlmayr.
    
Signed-off-by: Martin Michlmayr <tbm@cyrius.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Ralf Baechle 2006-02-27 19:05:55 +00:00
parent 7b14e3b52f
commit 4debe4f963
1 changed files with 11 additions and 5 deletions
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16
arch/mips/mm/c-r4k.c
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@ -235,7 +235,9 @@ static inline void r4k_blast_scache_page_setup(void)
{
unsigned long sc_lsize = cpu_scache_line_size();
if (sc_lsize == 16)
if (scache_size == 0)
r4k_blast_scache_page = (void *)no_sc_noop;
else if (sc_lsize == 16)
r4k_blast_scache_page = blast_scache16_page;
else if (sc_lsize == 32)
r4k_blast_scache_page = blast_scache32_page;
@ -251,7 +253,9 @@ static inline void r4k_blast_scache_page_indexed_setup(void)
{
unsigned long sc_lsize = cpu_scache_line_size();
if (sc_lsize == 16)
if (scache_size == 0)
r4k_blast_scache_page_indexed = (void *)no_sc_noop;
else if (sc_lsize == 16)
r4k_blast_scache_page_indexed = blast_scache16_page_indexed;
else if (sc_lsize == 32)
r4k_blast_scache_page_indexed = blast_scache32_page_indexed;
@ -267,7 +271,9 @@ static inline void r4k_blast_scache_setup(void)
{
unsigned long sc_lsize = cpu_scache_line_size();
if (sc_lsize == 16)
if (scache_size == 0)
r4k_blast_scache = (void *)no_sc_noop;
else if (sc_lsize == 16)
r4k_blast_scache = blast_scache16;
else if (sc_lsize == 32)
r4k_blast_scache = blast_scache32;
@ -482,7 +488,7 @@ static inline void local_r4k_flush_icache_range(void *args)
protected_blast_dcache_range(start, end);
}
if (!cpu_icache_snoops_remote_store) {
if (!cpu_icache_snoops_remote_store && scache_size) {
if (end - start > scache_size)
r4k_blast_scache();
else
@ -651,7 +657,7 @@ static void local_r4k_flush_cache_sigtramp(void * arg)
R4600_HIT_CACHEOP_WAR_IMPL;
protected_writeback_dcache_line(addr & ~(dc_lsize - 1));
if (!cpu_icache_snoops_remote_store)
if (!cpu_icache_snoops_remote_store && scache_size)
protected_writeback_scache_line(addr & ~(sc_lsize - 1));
protected_flush_icache_line(addr & ~(ic_lsize - 1));
if (MIPS4K_ICACHE_REFILL_WAR) {