Loongson-3 CPU family:
Code-name Brand-name PRId
Loongson-3A R1 Loongson-3A1000 0x6305
Loongson-3A R2 Loongson-3A2000 0x6308
Loongson-3B R1 Loongson-3B1000 0x6306
Loongson-3B R2 Loongson-3B1500 0x6307
Features of R2 revision of Loongson-3A:
1, Primary cache includes I-Cache, D-Cache and V-Cache (Victim Cache).
2, I-Cache, D-Cache and V-Cache are 16-way set-associative, linesize is 64 Bytes.
3, 64 entries of VTLB (classic TLB), 1024 entries of FTLB (8-way set-associative).
4, Support DSP/DSPv2 instructions, UserLocal register and Read-Inhibit/Execute-Inhibit.
Signed-off-by: Huacai Chen <chenhc@xxxxxxxxxx>
---
arch/mips/Kconfig | 1 +
arch/mips/include/asm/cacheops.h | 6 ++
arch/mips/include/asm/cpu-info.h | 1 +
arch/mips/include/asm/cpu.h | 4 +-
.../asm/mach-loongson64/cpu-feature-overrides.h | 12 +--
.../asm/mach-loongson64/kernel-entry-init.h | 6 +-
arch/mips/include/asm/mipsregs.h | 2 +
arch/mips/include/asm/pgtable-bits.h | 8 +-
arch/mips/include/asm/pgtable.h | 4 +-
arch/mips/kernel/cpu-probe.c | 38 +++++++-
arch/mips/kernel/idle.c | 5 +
arch/mips/kernel/traps.c | 3 +-
arch/mips/loongson64/common/env.c | 7 +-
arch/mips/loongson64/loongson-3/smp.c | 106 +++++++++++++++++++--
arch/mips/mm/c-r4k.c | 27 ++++++
arch/mips/mm/tlbex.c | 2 +-
drivers/platform/mips/cpu_hwmon.c | 4 +-
17 files changed, 201 insertions(+), 35 deletions(-)
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 57a945e..15faaf0 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -1343,6 +1343,7 @@ config CPU_LOONGSON3
select CPU_SUPPORTS_HUGEPAGES
select WEAK_ORDERING
select WEAK_REORDERING_BEYOND_LLSC
+ select MIPS_PGD_C0_CONTEXT
select ARCH_REQUIRE_GPIOLIB
help
The Loongson 3 processor implements the MIPS64R2 instruction
diff --git a/arch/mips/include/asm/cacheops.h b/arch/mips/include/asm/cacheops.h
index c3212ff..8031fbc 100644
--- a/arch/mips/include/asm/cacheops.h
+++ b/arch/mips/include/asm/cacheops.h
@@ -21,6 +21,7 @@
#define Cache_I 0x00
#define Cache_D 0x01
#define Cache_T 0x02
+#define Cache_V 0x02 /* Loongson-3 */
#define Cache_S 0x03
#define Index_Writeback_Inv 0x00
@@ -107,4 +108,9 @@
*/
#define Hit_Invalidate_I_Loongson2 (Cache_I | 0x00)
+/*
+ * Loongson3-specific cacheops
+ */
+#define Index_Writeback_Inv_V (Cache_V | Index_Writeback_Inv)
+
#endif /* __ASM_CACHEOPS_H */
diff --git a/arch/mips/include/asm/cpu-info.h b/arch/mips/include/asm/cpu-info.h
index e7dc785..6fd7b8bd 100644
--- a/arch/mips/include/asm/cpu-info.h
+++ b/arch/mips/include/asm/cpu-info.h
@@ -60,6 +60,7 @@ struct cpuinfo_mips {
int tlbsizeftlbways;
struct cache_desc icache; /* Primary I-cache */
struct cache_desc dcache; /* Primary D or combined I/D cache */
+ struct cache_desc vcache; /* Victim cache, between pcache and scache */
struct cache_desc scache; /* Secondary cache */
struct cache_desc tcache; /* Tertiary/split secondary cache */
int srsets; /* Shadow register sets */
diff --git a/arch/mips/include/asm/cpu.h b/arch/mips/include/asm/cpu.h
index a97ca97..c4f7983 100644
--- a/arch/mips/include/asm/cpu.h
+++ b/arch/mips/include/asm/cpu.h
@@ -42,6 +42,7 @@
#define PRID_COMP_LEXRA 0x0b0000
#define PRID_COMP_NETLOGIC 0x0c0000
#define PRID_COMP_CAVIUM 0x0d0000
+#define PRID_COMP_LOONGSON 0x140000
#define PRID_COMP_INGENIC_D0 0xd00000 /* JZ4740, JZ4750 */
#define PRID_COMP_INGENIC_D1 0xd10000 /* JZ4770, JZ4775 */
#define PRID_COMP_INGENIC_E1 0xe10000 /* JZ4780 */
@@ -237,9 +238,10 @@
#define PRID_REV_LOONGSON1B 0x0020
#define PRID_REV_LOONGSON2E 0x0002
#define PRID_REV_LOONGSON2F 0x0003
-#define PRID_REV_LOONGSON3A 0x0005
+#define PRID_REV_LOONGSON3A_R1 0x0005
#define PRID_REV_LOONGSON3B_R1 0x0006
#define PRID_REV_LOONGSON3B_R2 0x0007
+#define PRID_REV_LOONGSON3A_R2 0x0008
/*
* Older processors used to encode processor version and revision in two
diff --git a/arch/mips/include/asm/mach-loongson64/cpu-feature-overrides.h b/arch/mips/include/asm/mach-loongson64/cpu-feature-overrides.h
index 98963c2..c3406db 100644
--- a/arch/mips/include/asm/mach-loongson64/cpu-feature-overrides.h
+++ b/arch/mips/include/asm/mach-loongson64/cpu-feature-overrides.h
@@ -16,11 +16,6 @@
#ifndef __ASM_MACH_LOONGSON64_CPU_FEATURE_OVERRIDES_H
#define __ASM_MACH_LOONGSON64_CPU_FEATURE_OVERRIDES_H
-#define cpu_dcache_line_size() 32
-#define cpu_icache_line_size() 32
-#define cpu_scache_line_size() 32
-
-
#define cpu_has_32fpr 1
#define cpu_has_3k_cache 0
#define cpu_has_4k_cache 1
@@ -31,8 +26,6 @@
#define cpu_has_counter 1
#define cpu_has_dc_aliases (PAGE_SIZE < 0x4000)
#define cpu_has_divec 0
-#define cpu_has_dsp 0
-#define cpu_has_dsp2 0
#define cpu_has_ejtag 0
#define cpu_has_ic_fills_f_dc 0
#define cpu_has_inclusive_pcaches 1
@@ -40,15 +33,11 @@
#define cpu_has_mcheck 0
#define cpu_has_mdmx 0
#define cpu_has_mips16 0
-#define cpu_has_mips32r2 0
#define cpu_has_mips3d 0
-#define cpu_has_mips64r2 0
#define cpu_has_mipsmt 0
-#define cpu_has_prefetch 0
#define cpu_has_smartmips 0
#define cpu_has_tlb 1
#define cpu_has_tx39_cache 0
-#define cpu_has_userlocal 0
#define cpu_has_vce 0
#define cpu_has_veic 0
#define cpu_has_vint 0
@@ -57,5 +46,6 @@
#define cpu_has_local_ebase 0
#define cpu_has_wsbh IS_ENABLED(CONFIG_CPU_LOONGSON3)
+#define cpu_hwrena_impl_bits 0xc0000000
#endif /* __ASM_MACH_LOONGSON64_CPU_FEATURE_OVERRIDES_H */
diff --git a/arch/mips/include/asm/mach-loongson64/kernel-entry-init.h b/arch/mips/include/asm/mach-loongson64/kernel-entry-init.h
index 3f2f84f..da83482 100644
--- a/arch/mips/include/asm/mach-loongson64/kernel-entry-init.h
+++ b/arch/mips/include/asm/mach-loongson64/kernel-entry-init.h
@@ -23,7 +23,8 @@
or t0, (0x1 << 7)
mtc0 t0, $16, 3
/* Set ELPA on LOONGSON3 pagegrain */
- li t0, (0x1 << 29)
+ mfc0 t0, $5, 1
+ or t0, (0x1 << 29)
mtc0 t0, $5, 1
_ehb
.set pop
@@ -42,7 +43,8 @@
or t0, (0x1 << 7)
mtc0 t0, $16, 3
/* Set ELPA on LOONGSON3 pagegrain */
- li t0, (0x1 << 29)
+ mfc0 t0, $5, 1
+ or t0, (0x1 << 29)
mtc0 t0, $5, 1
_ehb
.set pop
diff --git a/arch/mips/include/asm/mipsregs.h b/arch/mips/include/asm/mipsregs.h
index 3ad19ad..9290fd4 100644
--- a/arch/mips/include/asm/mipsregs.h
+++ b/arch/mips/include/asm/mipsregs.h
@@ -633,6 +633,8 @@
#define MIPS_CONF6_SYND (_ULCAST_(1) << 13)
/* proAptiv FTLB on/off bit */
#define MIPS_CONF6_FTLBEN (_ULCAST_(1) << 15)
+/* Loongson-3 FTLB on/off bit */
+#define MIPS_CONF6_FTLBDIS (_ULCAST_(1) << 22)
/* FTLB probability bits */
#define MIPS_CONF6_FTLBP_SHIFT (16)
diff --git a/arch/mips/include/asm/pgtable-bits.h b/arch/mips/include/asm/pgtable-bits.h
index 97b3138..32b77bd 100644
--- a/arch/mips/include/asm/pgtable-bits.h
+++ b/arch/mips/include/asm/pgtable-bits.h
@@ -113,7 +113,7 @@
#define _PAGE_PRESENT_SHIFT 0
#define _PAGE_PRESENT (1 << _PAGE_PRESENT_SHIFT)
/* R2 or later cores check for RI/XI support to determine _PAGE_READ */
-#if defined(CONFIG_CPU_MIPSR2) || defined(CONFIG_CPU_MIPSR6)
+#if defined(CONFIG_CPU_MIPSR2) || defined(CONFIG_CPU_MIPSR6) || defined(CONFIG_CPU_LOONGSON3)
#define _PAGE_WRITE_SHIFT (_PAGE_PRESENT_SHIFT + 1)
#define _PAGE_WRITE (1 << _PAGE_WRITE_SHIFT)
#else
@@ -133,7 +133,7 @@
#define _PAGE_HUGE (1 << _PAGE_HUGE_SHIFT)
#endif /* CONFIG_64BIT && CONFIG_MIPS_HUGE_TLB_SUPPORT */
-#if defined(CONFIG_CPU_MIPSR2) || defined(CONFIG_CPU_MIPSR6)
+#if defined(CONFIG_CPU_MIPSR2) || defined(CONFIG_CPU_MIPSR6) || defined(CONFIG_CPU_LOONGSON3)
/* XI - page cannot be executed */
#ifdef _PAGE_HUGE_SHIFT
#define _PAGE_NO_EXEC_SHIFT (_PAGE_HUGE_SHIFT + 1)
@@ -147,7 +147,7 @@
#define _PAGE_READ (cpu_has_rixi ? 0 : (1 << _PAGE_READ_SHIFT))
#define _PAGE_NO_READ_SHIFT _PAGE_READ_SHIFT
#define _PAGE_NO_READ (cpu_has_rixi ? (1 << _PAGE_READ_SHIFT) : 0)
-#endif /* defined(CONFIG_CPU_MIPSR2) || defined(CONFIG_CPU_MIPSR6) */
+#endif /* defined(CONFIG_CPU_MIPSR2) || defined(CONFIG_CPU_MIPSR6) || defined(CONFIG_CPU_LOONGSON3) */
#if defined(_PAGE_NO_READ_SHIFT)
#define _PAGE_GLOBAL_SHIFT (_PAGE_NO_READ_SHIFT + 1)
@@ -198,7 +198,7 @@
*/
static inline uint64_t pte_to_entrylo(unsigned long pte_val)
{
-#if defined(CONFIG_CPU_MIPSR2) || defined(CONFIG_CPU_MIPSR6)
+#if defined(CONFIG_CPU_MIPSR2) || defined(CONFIG_CPU_MIPSR6) || defined(CONFIG_CPU_LOONGSON3)
if (cpu_has_rixi) {
int sa;
#ifdef CONFIG_32BIT
diff --git a/arch/mips/include/asm/pgtable.h b/arch/mips/include/asm/pgtable.h
index 9a4fe01..35cd713 100644
--- a/arch/mips/include/asm/pgtable.h
+++ b/arch/mips/include/asm/pgtable.h
@@ -353,7 +353,7 @@ static inline pte_t pte_mkdirty(pte_t pte)
static inline pte_t pte_mkyoung(pte_t pte)
{
pte_val(pte) |= _PAGE_ACCESSED;
-#if defined(CONFIG_CPU_MIPSR2) || defined(CONFIG_CPU_MIPSR6)
+#if defined(CONFIG_CPU_MIPSR2) || defined(CONFIG_CPU_MIPSR6) || defined(CONFIG_CPU_LOONGSON3)
if (!(pte_val(pte) & _PAGE_NO_READ))
pte_val(pte) |= _PAGE_SILENT_READ;
else
@@ -542,7 +542,7 @@ static inline pmd_t pmd_mkyoung(pmd_t pmd)
{
pmd_val(pmd) |= _PAGE_ACCESSED;
-#if defined(CONFIG_CPU_MIPSR2) || defined(CONFIG_CPU_MIPSR6)
+#if defined(CONFIG_CPU_MIPSR2) || defined(CONFIG_CPU_MIPSR6) || defined(CONFIG_CPU_LOONGSON3)
if (!(pmd_val(pmd) & _PAGE_NO_READ))
pmd_val(pmd) |= _PAGE_SILENT_READ;
else
diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index b725b71..9e963f2 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -561,6 +561,16 @@ static int set_ftlb_enable(struct cpuinfo_mips *c, int enable)
write_c0_config7(config | (calculate_ftlb_probability(c)
<< MIPS_CONF7_FTLBP_SHIFT));
break;
+ case CPU_LOONGSON3:
+ /* Loongson-3 cores use Config6 to enable the FTLB */
+ config = read_c0_config6();
+ if (enable)
+ /* Enable FTLB */
+ write_c0_config6(config & ~MIPS_CONF6_FTLBDIS);
+ else
+ /* Disable FTLB */
+ write_c0_config6(config | MIPS_CONF6_FTLBDIS);
+ break;
default:
return 1;
}
@@ -1172,7 +1182,7 @@ static inline void cpu_probe_legacy(struct cpuinfo_mips *c, unsigned int cpu)
set_isa(c, MIPS_CPU_ISA_III);
c->fpu_msk31 |= FPU_CSR_CONDX;
break;
- case PRID_REV_LOONGSON3A:
+ case PRID_REV_LOONGSON3A_R1:
c->cputype = CPU_LOONGSON3;
__cpu_name[cpu] = "ICT Loongson-3";
set_elf_platform(cpu, "loongson3a");
@@ -1493,6 +1503,29 @@ platform:
}
}
+static inline void cpu_probe_loongson(struct cpuinfo_mips *c, unsigned int cpu)
+{
+ switch (c->processor_id & PRID_IMP_MASK) {
+ case PRID_IMP_LOONGSON_64: /* Loongson-2/3 */
+ switch (c->processor_id & PRID_REV_MASK) {
+ case PRID_REV_LOONGSON3A_R2:
+ c->cputype = CPU_LOONGSON3;
+ __cpu_name[cpu] = "ICT Loongson-3";
+ set_elf_platform(cpu, "loongson3a");
+ set_isa(c, MIPS_CPU_ISA_M64R2);
+ break;
+ }
+
+ decode_configs(c);
+ c->options |= MIPS_CPU_TLBINV;
+ c->writecombine = _CACHE_UNCACHED_ACCELERATED;
+ break;
+ default:
+ panic("Unknown Loongson Processor ID!");
+ break;
+ }
+}
+
static inline void cpu_probe_ingenic(struct cpuinfo_mips *c, unsigned int cpu)
{
decode_configs(c);
@@ -1640,6 +1673,9 @@ void cpu_probe(void)
case PRID_COMP_CAVIUM:
cpu_probe_cavium(c, cpu);
break;
+ case PRID_COMP_LOONGSON:
+ cpu_probe_loongson(c, cpu);
+ break;
case PRID_COMP_INGENIC_D0:
case PRID_COMP_INGENIC_D1:
case PRID_COMP_INGENIC_E1:
diff --git a/arch/mips/kernel/idle.c b/arch/mips/kernel/idle.c
index 46794d6..9ae2c46 100644
--- a/arch/mips/kernel/idle.c
+++ b/arch/mips/kernel/idle.c
@@ -181,6 +181,11 @@ void __init check_wait(void)
case CPU_XLP:
cpu_wait = r4k_wait;
break;
+ case CPU_LOONGSON3:
+ if ((read_c0_prid() & 0xf) == PRID_REV_LOONGSON3A_R2)
+ cpu_wait = r4k_wait;
+ break;
+
case CPU_BMIPS5000:
cpu_wait = r4k_wait_irqoff;
break;
diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index bafcb7a..165db67 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -1783,7 +1783,8 @@ asmlinkage void do_ftlb(void)
/* For the moment, report the problem and hang. */
if ((cpu_has_mips_r2_r6) &&
- ((current_cpu_data.processor_id & 0xff0000) == PRID_COMP_MIPS)) {
+ (((current_cpu_data.processor_id & 0xff0000) == PRID_COMP_MIPS) ||
+ ((current_cpu_data.processor_id & 0xff0000) == PRID_COMP_LOONGSON))) {
pr_err("FTLB error exception, cp0_ecc=0x%08x:\n",
read_c0_ecc());
pr_err("cp0_errorepc == %0*lx\n", field, read_c0_errorepc());
diff --git a/arch/mips/loongson64/common/env.c b/arch/mips/loongson64/common/env.c
index d6d07ad..57d590a 100644
--- a/arch/mips/loongson64/common/env.c
+++ b/arch/mips/loongson64/common/env.c
@@ -105,6 +105,10 @@ void __init prom_init_env(void)
loongson_chiptemp[1] = 0x900010001fe0019c;
loongson_chiptemp[2] = 0x900020001fe0019c;
loongson_chiptemp[3] = 0x900030001fe0019c;
+ loongson_freqctrl[0] = 0x900000001fe001d0;
+ loongson_freqctrl[1] = 0x900010001fe001d0;
+ loongson_freqctrl[2] = 0x900020001fe001d0;
+ loongson_freqctrl[3] = 0x900030001fe001d0;
loongson_sysconf.ht_control_base = 0x90000EFDFB000000;
loongson_sysconf.workarounds = WORKAROUND_CPUFREQ;
} else if (ecpu->cputype == Loongson_3B) {
@@ -187,7 +191,8 @@ void __init prom_init_env(void)
case PRID_REV_LOONGSON2F:
cpu_clock_freq = 797000000;
break;
- case PRID_REV_LOONGSON3A:
+ case PRID_REV_LOONGSON3A_R1:
+ case PRID_REV_LOONGSON3A_R2:
cpu_clock_freq = 900000000;
break;
case PRID_REV_LOONGSON3B_R1:
diff --git a/arch/mips/loongson64/loongson-3/smp.c b/arch/mips/loongson64/loongson-3/smp.c
index 509832a9..ef28d6a 100644
--- a/arch/mips/loongson64/loongson-3/smp.c
+++ b/arch/mips/loongson64/loongson-3/smp.c
@@ -440,7 +440,7 @@ static void loongson3_cpu_die(unsigned int cpu)
* flush all L1 entries at first. Then, another core (usually Core 0) can
* safely disable the clock of the target core. loongson3_play_dead() is
* called via CKSEG1 (uncached and unmmaped) */
-static void loongson3a_play_dead(int *state_addr)
+static void loongson3a_r1_play_dead(int *state_addr)
{
register int val;
register long cpuid, core, node, count;
@@ -502,6 +502,89 @@ static void loongson3a_play_dead(int *state_addr)
: "a1");
}
+static void loongson3a_r2_play_dead(int *state_addr)
+{
+ register int val;
+ register long cpuid, core, node, count;
+ register void *addr, *base, *initfunc;
+
+ __asm__ __volatile__(
+ " .set push \n"
+ " .set noreorder \n"
+ " li %[addr], 0x80000000 \n" /* KSEG0 */
+ "1: cache 0, 0(%[addr]) \n" /* flush L1 ICache */
+ " cache 0, 1(%[addr]) \n"
+ " cache 0, 2(%[addr]) \n"
+ " cache 0, 3(%[addr]) \n"
+ " cache 1, 0(%[addr]) \n" /* flush L1 DCache */
+ " cache 1, 1(%[addr]) \n"
+ " cache 1, 2(%[addr]) \n"
+ " cache 1, 3(%[addr]) \n"
+ " addiu %[sets], %[sets], -1 \n"
+ " bnez %[sets], 1b \n"
+ " addiu %[addr], %[addr], 0x40 \n"
+ " li %[addr], 0x80000000 \n" /* KSEG0 */
+ "2: cache 2, 0(%[addr]) \n" /* flush L1 VCache */
+ " cache 2, 1(%[addr]) \n"
+ " cache 2, 2(%[addr]) \n"
+ " cache 2, 3(%[addr]) \n"
+ " cache 2, 4(%[addr]) \n"
+ " cache 2, 5(%[addr]) \n"
+ " cache 2, 6(%[addr]) \n"
+ " cache 2, 7(%[addr]) \n"
+ " cache 2, 8(%[addr]) \n"
+ " cache 2, 9(%[addr]) \n"
+ " cache 2, 10(%[addr]) \n"
+ " cache 2, 11(%[addr]) \n"
+ " cache 2, 12(%[addr]) \n"
+ " cache 2, 13(%[addr]) \n"
+ " cache 2, 14(%[addr]) \n"
+ " cache 2, 15(%[addr]) \n"
+ " addiu %[vsets], %[vsets], -1 \n"
+ " bnez %[vsets], 2b \n"
+ " addiu %[addr], %[addr], 0x40 \n"
+ " li %[val], 0x7 \n" /* *state_addr = CPU_DEAD; */
+ " sw %[val], (%[state_addr]) \n"
+ " sync \n"
+ " cache 21, (%[state_addr]) \n" /* flush entry of *state_addr */
+ " .set pop \n"
+ : [addr] "=&r" (addr), [val] "=&r" (val)
+ : [state_addr] "r" (state_addr),
+ [sets] "r" (cpu_data[smp_processor_id()].dcache.sets),
+ [vsets] "r" (cpu_data[smp_processor_id()].vcache.sets));
+
+ __asm__ __volatile__(
+ " .set push \n"
+ " .set noreorder \n"
+ " .set mips64 \n"
+ " mfc0 %[cpuid], $15, 1 \n"
+ " andi %[cpuid], 0x3ff \n"
+ " dli %[base], 0x900000003ff01000 \n"
+ " andi %[core], %[cpuid], 0x3 \n"
+ " sll %[core], 8 \n" /* get core id */
+ " or %[base], %[base], %[core] \n"
+ " andi %[node], %[cpuid], 0xc \n"
+ " dsll %[node], 42 \n" /* get node id */
+ " or %[base], %[base], %[node] \n"
+ "1: li %[count], 0x100 \n" /* wait for init loop */
+ "2: bnez %[count], 2b \n" /* limit mailbox access */
+ " addiu %[count], -1 \n"
+ " ld %[initfunc], 0x20(%[base]) \n" /* get PC via mailbox */
+ " beqz %[initfunc], 1b \n"
+ " nop \n"
+ " ld $sp, 0x28(%[base]) \n" /* get SP via mailbox */
+ " ld $gp, 0x30(%[base]) \n" /* get GP via mailbox */
+ " ld $a1, 0x38(%[base]) \n"
+ " jr %[initfunc] \n" /* jump to initial PC */
+ " nop \n"
+ " .set pop \n"
+ : [core] "=&r" (core), [node] "=&r" (node),
+ [base] "=&r" (base), [cpuid] "=&r" (cpuid),
+ [count] "=&r" (count), [initfunc] "=&r" (initfunc)
+ : /* No Input */
+ : "a1");
+}
+
static void loongson3b_play_dead(int *state_addr)
{
register int val;
@@ -573,13 +656,18 @@ void play_dead(void)
void (*play_dead_at_ckseg1)(int *);
idle_task_exit();
- switch (loongson_sysconf.cputype) {
- case Loongson_3A:
+ switch (read_c0_prid() & 0xf) {
+ case PRID_REV_LOONGSON3A_R1:
default:
play_dead_at_ckseg1 =
- (void *)CKSEG1ADDR((unsigned long)loongson3a_play_dead);
+ (void *)CKSEG1ADDR((unsigned long)loongson3a_r1_play_dead);
+ break;
+ case PRID_REV_LOONGSON3A_R2:
+ play_dead_at_ckseg1 =
+ (void *)CKSEG1ADDR((unsigned long)loongson3a_r2_play_dead);
break;
- case Loongson_3B:
+ case PRID_REV_LOONGSON3B_R1:
+ case PRID_REV_LOONGSON3B_R2:
play_dead_at_ckseg1 =
(void *)CKSEG1ADDR((unsigned long)loongson3b_play_dead);
break;
@@ -594,9 +682,9 @@ void loongson3_disable_clock(int cpu)
uint64_t core_id = cpu_data[cpu].core;
uint64_t package_id = cpu_data[cpu].package;
- if (loongson_sysconf.cputype == Loongson_3A) {
+ if ((read_c0_prid() & 0xf) == PRID_REV_LOONGSON3A_R1) {
LOONGSON_CHIPCFG(package_id) &= ~(1 << (12 + core_id));
- } else if (loongson_sysconf.cputype == Loongson_3B) {
+ } else {
if (!(loongson_sysconf.workarounds & WORKAROUND_CPUHOTPLUG))
LOONGSON_FREQCTRL(package_id) &= ~(1 << (core_id * 4 + 3));
}
@@ -607,9 +695,9 @@ void loongson3_enable_clock(int cpu)
uint64_t core_id = cpu_data[cpu].core;
uint64_t package_id = cpu_data[cpu].package;
- if (loongson_sysconf.cputype == Loongson_3A) {
+ if ((read_c0_prid() & 0xf) == PRID_REV_LOONGSON3A_R1) {
LOONGSON_CHIPCFG(package_id) |= 1 << (12 + core_id);
- } else if (loongson_sysconf.cputype == Loongson_3B) {
+ } else {
if (!(loongson_sysconf.workarounds & WORKAROUND_CPUHOTPLUG))
LOONGSON_FREQCTRL(package_id) |= 1 << (core_id * 4 + 3);
}
diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c
index caac3d7..2abc73d 100644
--- a/arch/mips/mm/c-r4k.c
+++ b/arch/mips/mm/c-r4k.c
@@ -77,6 +77,7 @@ static inline void r4k_on_each_cpu(void (*func) (void *info), void *info)
*/
static unsigned long icache_size __read_mostly;
static unsigned long dcache_size __read_mostly;
+static unsigned long vcache_size __read_mostly;
static unsigned long scache_size __read_mostly;
/*
@@ -1328,6 +1329,31 @@ static void probe_pcache(void)
c->dcache.linesz);
}
+static void probe_vcache(void)
+{
+ struct cpuinfo_mips *c = ¤t_cpu_data;
+ unsigned int config2, lsize;
+
+ if (current_cpu_type() != CPU_LOONGSON3)
+ return;
+
+ config2 = read_c0_config2();
+ if ((lsize = ((config2 >> 20) & 15)))
+ c->vcache.linesz = 2 << lsize;
+ else
+ c->vcache.linesz = lsize;
+
+ c->vcache.sets = 64 << ((config2 >> 24) & 15);
+ c->vcache.ways = 1 + ((config2 >> 16) & 15);
+
+ vcache_size = c->vcache.sets * c->vcache.ways * c->vcache.linesz;
+
+ c->vcache.waybit = 0;
+
+ pr_info("Unified victim cache %ldkB %s, linesize %d bytes.\n",
+ vcache_size >> 10, way_string[c->vcache.ways], c->vcache.linesz);
+}
+
/*
* If you even _breathe_ on this function, look at the gcc output and make sure
* it does not pop things on and off the stack for the cache sizing loop that
@@ -1650,6 +1676,7 @@ void r4k_cache_init(void)
struct cpuinfo_mips *c = ¤t_cpu_data;
probe_pcache();
+ probe_vcache();
setup_scache();
r4k_blast_dcache_page_setup();
diff --git a/arch/mips/mm/tlbex.c b/arch/mips/mm/tlbex.c
index 5a04b6f..e3574f4 100644
--- a/arch/mips/mm/tlbex.c
+++ b/arch/mips/mm/tlbex.c
@@ -241,7 +241,7 @@ static void output_pgtable_bits_defines(void)
#ifdef CONFIG_MIPS_HUGE_TLB_SUPPORT
pr_define("_PAGE_HUGE_SHIFT %d\n", _PAGE_HUGE_SHIFT);
#endif
-#if defined(CONFIG_CPU_MIPSR2) || defined(CONFIG_CPU_MIPSR6)
+#if defined(CONFIG_CPU_MIPSR2) || defined(CONFIG_CPU_MIPSR6) || defined(CONFIG_CPU_LOONGSON3)
if (cpu_has_rixi) {
#ifdef _PAGE_NO_EXEC_SHIFT
pr_define("_PAGE_NO_EXEC_SHIFT %d\n", _PAGE_NO_EXEC_SHIFT);
diff --git a/drivers/platform/mips/cpu_hwmon.c b/drivers/platform/mips/cpu_hwmon.c
index 0f6c63e..7c56d71 100644
--- a/drivers/platform/mips/cpu_hwmon.c
+++ b/drivers/platform/mips/cpu_hwmon.c
@@ -20,9 +20,9 @@ int loongson3_cpu_temp(int cpu)
u32 reg;
reg = LOONGSON_CHIPTEMP(cpu);
- if (loongson_sysconf.cputype == Loongson_3A)
+ if ((read_c0_prid() & 0xf) == PRID_REV_LOONGSON3A_R1)
reg = (reg >> 8) & 0xff;
- else if (loongson_sysconf.cputype == Loongson_3B)
+ else
reg = ((reg >> 8) & 0xff) - 100;
return (int)reg * 1000;
--
2.4.6
