Commit-ID: daf7b9c9216e2b82e4c14b7248a85286dab021c3
Gitweb: http://git.kernel.org/tip/daf7b9c9216e2b82e4c14b7248a85286dab021c3
Author: Jack Steiner <steiner@xxxxxxx>
AuthorDate: Wed, 9 Sep 2009 10:43:39 -0500
Committer: Ingo Molnar <mingo@xxxxxxx>
CommitDate: Fri, 18 Sep 2009 14:06:40 +0200
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@xxxxxxx>
LKML-Reference: <20090909154339.GA7946@xxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
---
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 6011593..f5f5886 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();
--
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