From: David Daney <david.daney@xxxxxxxxxx>
These are needed to boot a generic mips64r2 kernel on OCTEONIII.
Signed-off-by: David Daney <david.daney@xxxxxxxxxx>
Signed-off-by: Andreas Herrmann <andreas.herrmann@xxxxxxxxxxxxxxxxxx>
---
arch/mips/include/asm/r4kcache.h | 2 ++
arch/mips/mm/c-r4k.c | 48 ++++++++++++++++++++++++++++++++++----
2 files changed, 46 insertions(+), 4 deletions(-)
[andreas.herrmann:
* Remove R4600_HIT_CACHEOP_WAR_IMPL from r4k_blast_dcache_page_dc128()
* Use switch statement in r4k_blast_dcache_page_setup()]
diff --git a/arch/mips/include/asm/r4kcache.h b/arch/mips/include/asm/r4kcache.h
index fe8d1b6..0b8bd28 100644
--- a/arch/mips/include/asm/r4kcache.h
+++ b/arch/mips/include/asm/r4kcache.h
@@ -523,6 +523,8 @@ __BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 32,
__BUILD_BLAST_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, 64, )
__BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 64, )
__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 64, )
+__BUILD_BLAST_CACHE(d, dcache, Index_Writeback_Inv_D, Hit_Writeback_Inv_D, 128, )
+__BUILD_BLAST_CACHE(i, icache, Index_Invalidate_I, Hit_Invalidate_I, 128, )
__BUILD_BLAST_CACHE(s, scache, Index_Writeback_Inv_SD, Hit_Writeback_Inv_SD, 128, )
__BUILD_BLAST_CACHE(inv_d, dcache, Index_Writeback_Inv_D, Hit_Invalidate_D, 16, )
diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c
index 5c21282..3eb7270 100644
--- a/arch/mips/mm/c-r4k.c
+++ b/arch/mips/mm/c-r4k.c
@@ -108,18 +108,34 @@ static inline void r4k_blast_dcache_page_dc64(unsigned long addr)
blast_dcache64_page(addr);
}
+static inline void r4k_blast_dcache_page_dc128(unsigned long addr)
+{
+ blast_dcache128_page(addr);
+}
+
static void r4k_blast_dcache_page_setup(void)
{
unsigned long dc_lsize = cpu_dcache_line_size();
- if (dc_lsize == 0)
+ switch (dc_lsize) {
+ case 0:
r4k_blast_dcache_page = (void *)cache_noop;
- else if (dc_lsize == 16)
+ break;
+ case 16:
r4k_blast_dcache_page = blast_dcache16_page;
- else if (dc_lsize == 32)
+ break;
+ case 32:
r4k_blast_dcache_page = r4k_blast_dcache_page_dc32;
- else if (dc_lsize == 64)
+ break;
+ case 64:
r4k_blast_dcache_page = r4k_blast_dcache_page_dc64;
+ break;
+ case 128:
+ r4k_blast_dcache_page = r4k_blast_dcache_page_dc128;
+ break;
+ default:
+ break;
+ }
}
#ifndef CONFIG_EVA
@@ -158,6 +174,8 @@ static void r4k_blast_dcache_page_indexed_setup(void)
r4k_blast_dcache_page_indexed = blast_dcache32_page_indexed;
else if (dc_lsize == 64)
r4k_blast_dcache_page_indexed = blast_dcache64_page_indexed;
+ else if (dc_lsize == 128)
+ r4k_blast_dcache_page_indexed = blast_dcache128_page_indexed;
}
void (* r4k_blast_dcache)(void);
@@ -175,6 +193,8 @@ static void r4k_blast_dcache_setup(void)
r4k_blast_dcache = blast_dcache32;
else if (dc_lsize == 64)
r4k_blast_dcache = blast_dcache64;
+ else if (dc_lsize == 128)
+ r4k_blast_dcache = blast_dcache128;
}
/* force code alignment (used for TX49XX_ICACHE_INDEX_INV_WAR) */
@@ -264,6 +284,8 @@ static void r4k_blast_icache_page_setup(void)
r4k_blast_icache_page = blast_icache32_page;
else if (ic_lsize == 64)
r4k_blast_icache_page = blast_icache64_page;
+ else if (ic_lsize == 128)
+ r4k_blast_icache_page = blast_icache128_page;
}
#ifndef CONFIG_EVA
@@ -337,6 +359,8 @@ static void r4k_blast_icache_setup(void)
r4k_blast_icache = blast_icache32;
} else if (ic_lsize == 64)
r4k_blast_icache = blast_icache64;
+ else if (ic_lsize == 128)
+ r4k_blast_icache = blast_icache128;
}
static void (* r4k_blast_scache_page)(unsigned long addr);
@@ -1093,6 +1117,21 @@ static void probe_pcache(void)
c->dcache.waybit = 0;
break;
+ case CPU_CAVIUM_OCTEON3:
+ /* For now lie about the number of ways. */
+ c->icache.linesz = 128;
+ c->icache.sets = 16;
+ c->icache.ways = 8;
+ c->icache.flags |= MIPS_CACHE_VTAG;
+ icache_size = c->icache.sets * c->icache.ways * c->icache.linesz;
+
+ c->dcache.linesz = 128;
+ c->dcache.ways = 8;
+ c->dcache.sets = 8;
+ dcache_size = c->dcache.sets * c->dcache.ways * c->dcache.linesz;
+ c->options |= MIPS_CPU_PREFETCH;
+ break;
+
default:
if (!(config & MIPS_CONF_M))
panic("Don't know how to probe P-caches on this cpu.");
@@ -1413,6 +1452,7 @@ static void setup_scache(void)
loongson3_sc_init();
return;
+ case CPU_CAVIUM_OCTEON3:
case CPU_XLP:
/* don't need to worry about L2, fully coherent */
return;
--
1.7.9.5
--
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