diff options
| author | Jayachandran C <jchandra@broadcom.com> | 2013-08-11 14:43:54 +0530 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2013-09-03 23:22:19 +0200 |
| commit | 4ca86a2ff37ce92b6875a184a97a20188704cb6c (patch) | |
| tree | bb9b5608a7031cd64a5f24dfcd1abdebaf44507e /arch/mips | |
| parent | 13314a91f0588546023570cfc9a1cf4ca5027c75 (diff) | |
| download | linux-4ca86a2ff37ce92b6875a184a97a20188704cb6c.tar.bz2 | |
MIPS: Netlogic: Add support for XLP2XX
XLP2XX is first in the series of 28nm XLPII processors.
The changes are to:
* Add processor ID for XLP2XX to asm/cpu.h and kernel/cpu-probe.c.
* Add a cpu_is_xlpii() function to check for XLPII processors.
* Update xlp_mmu_init() to use config4 to enable extended TLB.
Signed-off-by: Jayachandran C <jchandra@broadcom.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5698/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips')
| -rw-r--r-- | arch/mips/include/asm/cpu.h | 1 | ||||
| -rw-r--r-- | arch/mips/include/asm/netlogic/xlp-hal/xlp.h | 7 | ||||
| -rw-r--r-- | arch/mips/kernel/cpu-probe.c | 5 | ||||
| -rw-r--r-- | arch/mips/netlogic/xlp/setup.c | 27 |
4 files changed, 33 insertions, 7 deletions
diff --git a/arch/mips/include/asm/cpu.h b/arch/mips/include/asm/cpu.h index c19861518c32..71b9f1998be7 100644 --- a/arch/mips/include/asm/cpu.h +++ b/arch/mips/include/asm/cpu.h @@ -179,6 +179,7 @@ #define PRID_IMP_NETLOGIC_XLP8XX 0x1000 #define PRID_IMP_NETLOGIC_XLP3XX 0x1100 +#define PRID_IMP_NETLOGIC_XLP2XX 0x1200 /* * Definitions for 7:0 on legacy processors diff --git a/arch/mips/include/asm/netlogic/xlp-hal/xlp.h b/arch/mips/include/asm/netlogic/xlp-hal/xlp.h index d59cdd69496b..7a4a5142bbc5 100644 --- a/arch/mips/include/asm/netlogic/xlp-hal/xlp.h +++ b/arch/mips/include/asm/netlogic/xlp-hal/xlp.h @@ -64,5 +64,12 @@ int xlp_get_dram_map(int n, uint64_t *dram_map); /* Device tree related */ void *xlp_dt_init(void *fdtp); +static inline int cpu_is_xlpii(void) +{ + int chip = read_c0_prid() & 0xff00; + + return chip == PRID_IMP_NETLOGIC_XLP2XX; +} + #endif /* !__ASSEMBLY__ */ #endif /* _ASM_NLM_XLP_H */ diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c index 8e8feb851f6b..37663c7862a5 100644 --- a/arch/mips/kernel/cpu-probe.c +++ b/arch/mips/kernel/cpu-probe.c @@ -906,6 +906,11 @@ static inline void cpu_probe_netlogic(struct cpuinfo_mips *c, int cpu) MIPS_CPU_LLSC); switch (c->processor_id & 0xff00) { + case PRID_IMP_NETLOGIC_XLP2XX: + c->cputype = CPU_XLP; + __cpu_name[cpu] = "Broadcom XLPII"; + break; + case PRID_IMP_NETLOGIC_XLP8XX: case PRID_IMP_NETLOGIC_XLP3XX: c->cputype = CPU_XLP; diff --git a/arch/mips/netlogic/xlp/setup.c b/arch/mips/netlogic/xlp/setup.c index 7718368e4598..76a7131e486e 100644 --- a/arch/mips/netlogic/xlp/setup.c +++ b/arch/mips/netlogic/xlp/setup.c @@ -110,7 +110,12 @@ void __init plat_mem_setup(void) const char *get_system_type(void) { - return "Netlogic XLP Series"; + switch (read_c0_prid() & 0xff00) { + case PRID_IMP_NETLOGIC_XLP2XX: + return "Broadcom XLPII Series"; + default: + return "Netlogic XLP Series"; + } } void __init prom_free_prom_memory(void) @@ -120,12 +125,20 @@ void __init prom_free_prom_memory(void) void xlp_mmu_init(void) { - /* enable extended TLB and Large Fixed TLB */ - write_c0_config6(read_c0_config6() | 0x24); - - /* set page mask of Fixed TLB in config7 */ - write_c0_config7(PM_DEFAULT_MASK >> - (13 + (ffz(PM_DEFAULT_MASK >> 13) / 2))); + u32 conf4; + + if (cpu_is_xlpii()) { + /* XLPII series has extended pagesize in config 4 */ + conf4 = read_c0_config4() & ~0x1f00u; + write_c0_config4(conf4 | ((PAGE_SHIFT - 10) / 2 << 8)); + } else { + /* enable extended TLB and Large Fixed TLB */ + write_c0_config6(read_c0_config6() | 0x24); + + /* set page mask of extended Fixed TLB in config7 */ + write_c0_config7(PM_DEFAULT_MASK >> + (13 + (ffz(PM_DEFAULT_MASK >> 13) / 2))); + } } void nlm_percpu_init(int hwcpuid) |