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| author | Jack Steiner <steiner@sgi.com> | 2009-11-25 10:20:19 -0600 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-11-26 10:52:36 +0100 |
| commit | 918bc960dc630b1a79c0d2991a81985812ff69f5 (patch) | |
| tree | 669b047aa43c2a0b42242fb84571ed58a20f7c0c | |
| parent | 163d3866cfa79aa5945f1ee5e43fb3ed1455f75c (diff) | |
| download | linux-918bc960dc630b1a79c0d2991a81985812ff69f5.tar.gz linux-918bc960dc630b1a79c0d2991a81985812ff69f5.tar.bz2 linux-918bc960dc630b1a79c0d2991a81985812ff69f5.zip | |
x86: SGI UV: Map low MMR ranges
Explicitly mmap the UV chipset MMR address ranges used to
access blade-local registers. Although these same MMRs are also
mmaped at higher addresses, the low range is more
convenient when accessing blade-local registers.
The low range addresses always alias to the local blade
regardless of the blade id.
Signed-off-by: Jack Steiner <steiner@sgi.com>
LKML-Reference: <20091125162018.GA25445@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | arch/x86/kernel/apic/x2apic_uv_x.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c index f5f5886a6b53..6d425490fb1f 100644 --- a/arch/x86/kernel/apic/x2apic_uv_x.c +++ b/arch/x86/kernel/apic/x2apic_uv_x.c @@ -409,6 +409,12 @@ static __init void map_mmioh_high(int max_pnode) map_high("MMIOH", mmioh.s.base, shift, max_pnode, map_uc); } +static __init void map_low_mmrs(void) +{ + init_extra_mapping_uc(UV_GLOBAL_MMR32_BASE, UV_GLOBAL_MMR32_SIZE); + init_extra_mapping_uc(UV_LOCAL_MMR_BASE, UV_LOCAL_MMR_SIZE); +} + static __init void uv_rtc_init(void) { long status; @@ -550,6 +556,8 @@ void __init uv_system_init(void) unsigned long mmr_base, present, paddr; unsigned short pnode_mask; + map_low_mmrs(); + m_n_config.v = uv_read_local_mmr(UVH_SI_ADDR_MAP_CONFIG); m_val = m_n_config.s.m_skt; n_val = m_n_config.s.n_skt; |