x86: SGI UV: Fix mapping of MMIO registers

This fixes the problem of the initialization code not correctly
mapping the entire MMIO space on a UV system.  A side effect is
the map_high() interface needed to be changed to accommodate
different address and size shifts.

Signed-off-by: Mike Travis <travis@sgi.com>
Reviewed-by: Mike Habeck <habeck@sgi.com>
Cc: <stable@kernel.org>
Cc: Jack Steiner <steiner@sgi.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <4B479202.7080705@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 8 insertions, 7 deletions

diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
index 5f92494dab6..b8bb869a661 100644
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -374,13 +374,13 @@ static __init void get_lowmem_redirect(unsigned long *base, unsigned long *size)
 
 enum map_type {map_wb, map_uc};
 
-static __init void map_high(char *id, unsigned long base, int shift,
-                            int max_pnode, enum map_type map_type)
+static __init void map_high(char *id, unsigned long base, int pshift,
+                        int bshift, int max_pnode, enum map_type map_type)
 {
         unsigned long bytes, paddr;
 
-        paddr = base << shift;
-        bytes = (1UL << shift) * (max_pnode + 1);
+        paddr = base << pshift;
+        bytes = (1UL << bshift) * (max_pnode + 1);
         printk(KERN_INFO "UV: Map %s_HI 0x%lx - 0x%lx\n", id, paddr,
                                                 paddr + bytes);
         if (map_type == map_uc)
@@ -396,7 +396,7 @@ static __init void map_gru_high(int max_pnode)
 
         gru.v = uv_read_local_mmr(UVH_RH_GAM_GRU_OVERLAY_CONFIG_MMR);
         if (gru.s.enable) {
-                map_high("GRU", gru.s.base, shift, max_pnode, map_wb);
+                map_high("GRU", gru.s.base, shift, shift, max_pnode, map_wb);
                 gru_start_paddr = ((u64)gru.s.base << shift);
                 gru_end_paddr = gru_start_paddr + (1UL << shift) * (max_pnode + 1);
 
@@ -410,7 +410,7 @@ static __init void map_mmr_high(int max_pnode)
 
         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);
+                map_high("MMR", mmr.s.base, shift, shift, max_pnode, map_uc);
 }
 
 static __init void map_mmioh_high(int max_pnode)
@@ -420,7 +420,8 @@ static __init void map_mmioh_high(int max_pnode)
 
         mmioh.v = uv_read_local_mmr(UVH_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR);
         if (mmioh.s.enable)
-                map_high("MMIOH", mmioh.s.base, shift, max_pnode, map_uc);
+                map_high("MMIOH", mmioh.s.base, shift, mmioh.s.m_io,
+                        max_pnode, map_uc);
 }
 
 static __init void map_low_mmrs(void)