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Diffstat (limited to 'arch/mips/mm/c-r4k.c')
-rw-r--r--arch/mips/mm/c-r4k.c84
1 files changed, 51 insertions, 33 deletions
diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c
index 21813beec7a5..bc6f96fcb529 100644
--- a/arch/mips/mm/c-r4k.c
+++ b/arch/mips/mm/c-r4k.c
@@ -12,6 +12,7 @@
#include <linux/highmem.h>
#include <linux/kernel.h>
#include <linux/linkage.h>
+#include <linux/preempt.h>
#include <linux/sched.h>
#include <linux/smp.h>
#include <linux/mm.h>
@@ -24,6 +25,7 @@
#include <asm/cacheops.h>
#include <asm/cpu.h>
#include <asm/cpu-features.h>
+#include <asm/cpu-type.h>
#include <asm/io.h>
#include <asm/page.h>
#include <asm/pgtable.h>
@@ -107,7 +109,7 @@ static inline void r4k_blast_dcache_page_dc64(unsigned long addr)
blast_dcache64_page(addr);
}
-static void __cpuinit r4k_blast_dcache_page_setup(void)
+static void r4k_blast_dcache_page_setup(void)
{
unsigned long dc_lsize = cpu_dcache_line_size();
@@ -123,7 +125,7 @@ static void __cpuinit r4k_blast_dcache_page_setup(void)
static void (* r4k_blast_dcache_page_indexed)(unsigned long addr);
-static void __cpuinit r4k_blast_dcache_page_indexed_setup(void)
+static void r4k_blast_dcache_page_indexed_setup(void)
{
unsigned long dc_lsize = cpu_dcache_line_size();
@@ -140,7 +142,7 @@ static void __cpuinit r4k_blast_dcache_page_indexed_setup(void)
void (* r4k_blast_dcache)(void);
EXPORT_SYMBOL(r4k_blast_dcache);
-static void __cpuinit r4k_blast_dcache_setup(void)
+static void r4k_blast_dcache_setup(void)
{
unsigned long dc_lsize = cpu_dcache_line_size();
@@ -227,7 +229,7 @@ static inline void tx49_blast_icache32_page_indexed(unsigned long page)
static void (* r4k_blast_icache_page)(unsigned long addr);
-static void __cpuinit r4k_blast_icache_page_setup(void)
+static void r4k_blast_icache_page_setup(void)
{
unsigned long ic_lsize = cpu_icache_line_size();
@@ -244,7 +246,7 @@ static void __cpuinit r4k_blast_icache_page_setup(void)
static void (* r4k_blast_icache_page_indexed)(unsigned long addr);
-static void __cpuinit r4k_blast_icache_page_indexed_setup(void)
+static void r4k_blast_icache_page_indexed_setup(void)
{
unsigned long ic_lsize = cpu_icache_line_size();
@@ -269,7 +271,7 @@ static void __cpuinit r4k_blast_icache_page_indexed_setup(void)
void (* r4k_blast_icache)(void);
EXPORT_SYMBOL(r4k_blast_icache);
-static void __cpuinit r4k_blast_icache_setup(void)
+static void r4k_blast_icache_setup(void)
{
unsigned long ic_lsize = cpu_icache_line_size();
@@ -290,7 +292,7 @@ static void __cpuinit r4k_blast_icache_setup(void)
static void (* r4k_blast_scache_page)(unsigned long addr);
-static void __cpuinit r4k_blast_scache_page_setup(void)
+static void r4k_blast_scache_page_setup(void)
{
unsigned long sc_lsize = cpu_scache_line_size();
@@ -308,7 +310,7 @@ static void __cpuinit r4k_blast_scache_page_setup(void)
static void (* r4k_blast_scache_page_indexed)(unsigned long addr);
-static void __cpuinit r4k_blast_scache_page_indexed_setup(void)
+static void r4k_blast_scache_page_indexed_setup(void)
{
unsigned long sc_lsize = cpu_scache_line_size();
@@ -326,7 +328,7 @@ static void __cpuinit r4k_blast_scache_page_indexed_setup(void)
static void (* r4k_blast_scache)(void);
-static void __cpuinit r4k_blast_scache_setup(void)
+static void r4k_blast_scache_setup(void)
{
unsigned long sc_lsize = cpu_scache_line_size();
@@ -601,11 +603,13 @@ static void r4k_dma_cache_wback_inv(unsigned long addr, unsigned long size)
/* Catch bad driver code */
BUG_ON(size == 0);
+ preempt_disable();
if (cpu_has_inclusive_pcaches) {
if (size >= scache_size)
r4k_blast_scache();
else
blast_scache_range(addr, addr + size);
+ preempt_enable();
__sync();
return;
}
@@ -621,6 +625,7 @@ static void r4k_dma_cache_wback_inv(unsigned long addr, unsigned long size)
R4600_HIT_CACHEOP_WAR_IMPL;
blast_dcache_range(addr, addr + size);
}
+ preempt_enable();
bc_wback_inv(addr, size);
__sync();
@@ -631,6 +636,7 @@ static void r4k_dma_cache_inv(unsigned long addr, unsigned long size)
/* Catch bad driver code */
BUG_ON(size == 0);
+ preempt_disable();
if (cpu_has_inclusive_pcaches) {
if (size >= scache_size)
r4k_blast_scache();
@@ -645,6 +651,7 @@ static void r4k_dma_cache_inv(unsigned long addr, unsigned long size)
*/
blast_inv_scache_range(addr, addr + size);
}
+ preempt_enable();
__sync();
return;
}
@@ -655,6 +662,7 @@ static void r4k_dma_cache_inv(unsigned long addr, unsigned long size)
R4600_HIT_CACHEOP_WAR_IMPL;
blast_inv_dcache_range(addr, addr + size);
}
+ preempt_enable();
bc_inv(addr, size);
__sync();
@@ -780,28 +788,38 @@ static inline void rm7k_erratum31(void)
static inline void alias_74k_erratum(struct cpuinfo_mips *c)
{
+ unsigned int imp = c->processor_id & PRID_IMP_MASK;
+ unsigned int rev = c->processor_id & PRID_REV_MASK;
+
/*
* Early versions of the 74K do not update the cache tags on a
* vtag miss/ptag hit which can occur in the case of KSEG0/KUSEG
* aliases. In this case it is better to treat the cache as always
* having aliases.
*/
- if ((c->processor_id & 0xff) <= PRID_REV_ENCODE_332(2, 4, 0))
- c->dcache.flags |= MIPS_CACHE_VTAG;
- if ((c->processor_id & 0xff) == PRID_REV_ENCODE_332(2, 4, 0))
- write_c0_config6(read_c0_config6() | MIPS_CONF6_SYND);
- if (((c->processor_id & 0xff00) == PRID_IMP_1074K) &&
- ((c->processor_id & 0xff) <= PRID_REV_ENCODE_332(1, 1, 0))) {
- c->dcache.flags |= MIPS_CACHE_VTAG;
- write_c0_config6(read_c0_config6() | MIPS_CONF6_SYND);
+ switch (imp) {
+ case PRID_IMP_74K:
+ if (rev <= PRID_REV_ENCODE_332(2, 4, 0))
+ c->dcache.flags |= MIPS_CACHE_VTAG;
+ if (rev == PRID_REV_ENCODE_332(2, 4, 0))
+ write_c0_config6(read_c0_config6() | MIPS_CONF6_SYND);
+ break;
+ case PRID_IMP_1074K:
+ if (rev <= PRID_REV_ENCODE_332(1, 1, 0)) {
+ c->dcache.flags |= MIPS_CACHE_VTAG;
+ write_c0_config6(read_c0_config6() | MIPS_CONF6_SYND);
+ }
+ break;
+ default:
+ BUG();
}
}
-static char *way_string[] __cpuinitdata = { NULL, "direct mapped", "2-way",
+static char *way_string[] = { NULL, "direct mapped", "2-way",
"3-way", "4-way", "5-way", "6-way", "7-way", "8-way"
};
-static void __cpuinit probe_pcache(void)
+static void probe_pcache(void)
{
struct cpuinfo_mips *c = &current_cpu_data;
unsigned int config = read_c0_config();
@@ -809,7 +827,7 @@ static void __cpuinit probe_pcache(void)
unsigned long config1;
unsigned int lsize;
- switch (c->cputype) {
+ switch (current_cpu_type()) {
case CPU_R4600: /* QED style two way caches? */
case CPU_R4700:
case CPU_R5000:
@@ -1025,7 +1043,8 @@ static void __cpuinit probe_pcache(void)
* presumably no vendor is shipping his hardware in the "bad"
* configuration.
*/
- if ((prid & 0xff00) == PRID_IMP_R4000 && (prid & 0xff) < 0x40 &&
+ if ((prid & PRID_IMP_MASK) == PRID_IMP_R4000 &&
+ (prid & PRID_REV_MASK) < PRID_REV_R4400 &&
!(config & CONF_SC) && c->icache.linesz != 16 &&
PAGE_SIZE <= 0x8000)
panic("Improper R4000SC processor configuration detected");
@@ -1045,7 +1064,7 @@ static void __cpuinit probe_pcache(void)
* normally they'd suffer from aliases but magic in the hardware deals
* with that for us so we don't need to take care ourselves.
*/
- switch (c->cputype) {
+ switch (current_cpu_type()) {
case CPU_20KC:
case CPU_25KF:
case CPU_SB1:
@@ -1065,7 +1084,7 @@ static void __cpuinit probe_pcache(void)
case CPU_34K:
case CPU_74K:
case CPU_1004K:
- if (c->cputype == CPU_74K)
+ if (current_cpu_type() == CPU_74K)
alias_74k_erratum(c);
if ((read_c0_config7() & (1 << 16))) {
/* effectively physically indexed dcache,
@@ -1078,7 +1097,7 @@ static void __cpuinit probe_pcache(void)
c->dcache.flags |= MIPS_CACHE_ALIASES;
}
- switch (c->cputype) {
+ switch (current_cpu_type()) {
case CPU_20KC:
/*
* Some older 20Kc chips doesn't have the 'VI' bit in
@@ -1119,7 +1138,7 @@ static void __cpuinit probe_pcache(void)
* executes in KSEG1 space or else you will crash and burn badly. You have
* been warned.
*/
-static int __cpuinit probe_scache(void)
+static int probe_scache(void)
{
unsigned long flags, addr, begin, end, pow2;
unsigned int config = read_c0_config();
@@ -1196,7 +1215,7 @@ extern int r5k_sc_init(void);
extern int rm7k_sc_init(void);
extern int mips_sc_init(void);
-static void __cpuinit setup_scache(void)
+static void setup_scache(void)
{
struct cpuinfo_mips *c = &current_cpu_data;
unsigned int config = read_c0_config();
@@ -1207,7 +1226,7 @@ static void __cpuinit setup_scache(void)
* processors don't have a S-cache that would be relevant to the
* Linux memory management.
*/
- switch (c->cputype) {
+ switch (current_cpu_type()) {
case CPU_R4000SC:
case CPU_R4000MC:
case CPU_R4400SC:
@@ -1329,7 +1348,7 @@ static void nxp_pr4450_fixup_config(void)
NXP_BARRIER();
}
-static int __cpuinitdata cca = -1;
+static int cca = -1;
static int __init cca_setup(char *str)
{
@@ -1340,7 +1359,7 @@ static int __init cca_setup(char *str)
early_param("cca", cca_setup);
-static void __cpuinit coherency_setup(void)
+static void coherency_setup(void)
{
if (cca < 0 || cca > 7)
cca = read_c0_config() & CONF_CM_CMASK;
@@ -1380,13 +1399,12 @@ static void __cpuinit coherency_setup(void)
}
}
-static void __cpuinit r4k_cache_error_setup(void)
+static void r4k_cache_error_setup(void)
{
extern char __weak except_vec2_generic;
extern char __weak except_vec2_sb1;
- struct cpuinfo_mips *c = &current_cpu_data;
- switch (c->cputype) {
+ switch (current_cpu_type()) {
case CPU_SB1:
case CPU_SB1A:
set_uncached_handler(0x100, &except_vec2_sb1, 0x80);
@@ -1398,7 +1416,7 @@ static void __cpuinit r4k_cache_error_setup(void)
}
}
-void __cpuinit r4k_cache_init(void)
+void r4k_cache_init(void)
{
extern void build_clear_page(void);
extern void build_copy_page(void);
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-15 18:25:10 +0100