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authorJack Steiner <steiner@sgi.com>2009-09-09 11:43:39 -0400
committerIngo Molnar <mingo@elte.hu>2009-09-18 08:06:40 -0400
commitdaf7b9c9216e2b82e4c14b7248a85286dab021c3 (patch)
tree4e9e085514a56cc9c15332c91ab249de8eb5d9ab /arch
parent8dc579e868addafd24c0a015c12f0e536b1084b1 (diff)
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')
-rw-r--r--arch/x86/kernel/apic/x2apic_uv_x.c11
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)
389 map_high("GRU", gru.s.base, shift, max_pnode, map_wb); 389 map_high("GRU", gru.s.base, shift, max_pnode, map_wb);
390} 390}
391 391
392static __init void map_mmr_high(int max_pnode)
393{
394 union uvh_rh_gam_mmr_overlay_config_mmr_u mmr;
395 int shift = UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR_BASE_SHFT;
396
397 mmr.v = uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR);
398 if (mmr.s.enable)
399 map_high("MMR", mmr.s.base, shift, max_pnode, map_uc);
400}
401
392static __init void map_mmioh_high(int max_pnode) 402static __init void map_mmioh_high(int max_pnode)
393{ 403{
394 union uvh_rh_gam_mmioh_overlay_config_mmr_u mmioh; 404 union uvh_rh_gam_mmioh_overlay_config_mmr_u mmioh;
@@ -643,6 +653,7 @@ void __init uv_system_init(void)
643 } 653 }
644 654
645 map_gru_high(max_pnode); 655 map_gru_high(max_pnode);
656 map_mmr_high(max_pnode);
646 map_mmioh_high(max_pnode); 657 map_mmioh_high(max_pnode);
647 658
648 uv_cpu_init(); 659 uv_cpu_init();