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| author |   Jack Steiner <steiner@sgi.com> | 2009-09-09 10:43:39 -0500 |
|---|---|---|
| committer |   Ingo Molnar <mingo@elte.hu> | 2009-09-18 14:06:40 +0200 |
| commit | daf7b9c9216e2b82e4c14b7248a85286dab021c3 (patch) | |
| tree | 4e9e085514a56cc9c15332c91ab249de8eb5d9ab /arch/x86/kernel/apic | |
| parent | x86: SGI UV: Add volatile semantics to macros that access chipset registers (diff) | |
| download | linux-dev-daf7b9c9216e2b82e4c14b7248a85286dab021c3.tar.xz linux-dev-daf7b9c9216e2b82e4c14b7248a85286dab021c3.zip | |
x86: SGI UV: Map MMIO-High memory range
UV depends on the MMRHI space being identity mapped. The patch:
x86: Make 64-bit efi_ioremap use ioremap on MMIO regions
changed this to make efi regions at a different address using
ioremap. Add the identity mapping to uv_system_init.
( Note this code was previously present but was deleted when BIOS
added the ranges to the EFI map - previous efi code identify
mapped the ranges. )
Signed-off-by: Jack Steiner <steiner@sgi.com>
LKML-Reference: <20090909154339.GA7946@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/apic')
| -rw-r--r-- | arch/x86/kernel/apic/x2apic_uv_x.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c index 601159374e87..f5f5886a6b53 100644 --- a/arch/x86/kernel/apic/x2apic_uv_x.c +++ b/arch/x86/kernel/apic/x2apic_uv_x.c @@ -389,6 +389,16 @@ static __init void map_gru_high(int max_pnode) map_high("GRU", gru.s.base, shift, max_pnode, map_wb); } +static __init void map_mmr_high(int max_pnode) +{ + union uvh_rh_gam_mmr_overlay_config_mmr_u mmr; + int shift = UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR_BASE_SHFT; + + mmr.v = uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR); + if (mmr.s.enable) + map_high("MMR", mmr.s.base, shift, max_pnode, map_uc); +} + static __init void map_mmioh_high(int max_pnode) { union uvh_rh_gam_mmioh_overlay_config_mmr_u mmioh; @@ -643,6 +653,7 @@ void __init uv_system_init(void) } map_gru_high(max_pnode); + map_mmr_high(max_pnode); map_mmioh_high(max_pnode); uv_cpu_init(); |