diff options
| author | Jayachandran C <jchandra@broadcom.com> | 2013-08-11 13:13:54 +0400 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2013-09-04 01:22:19 +0400 |
| commit | 4ca86a2ff37ce92b6875a184a97a20188704cb6c (patch) | |
| tree | bb9b5608a7031cd64a5f24dfcd1abdebaf44507e /arch/mips/netlogic/xlp | |
| parent | 13314a91f0588546023570cfc9a1cf4ca5027c75 (diff) | |
| download | linux-4ca86a2ff37ce92b6875a184a97a20188704cb6c.tar.xz | |
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/netlogic/xlp')
| -rw-r--r-- | arch/mips/netlogic/xlp/setup.c | 27 |
1 files changed, 20 insertions, 7 deletions
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) |