From: Mike Travis <travis@sgi.com>
To: Linus Torvalds <torvalds@linux-foundation.org>,
Ingo Molnar <mingo@redhat.com>
Cc: Mike Habeck <habeck@sgi.com>,
stable@kernel.org, x86@kernel.org,
LKML <linux-kernel@vger.kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
"H. Peter Anvin" <hpa@zytor.com>, Jack Steiner <steiner@sgi.com>
Subject: [PATCH] x86_64 SGI UV: Fix mapping of MMIO registers
Date: Fri, 08 Jan 2010 12:13:54 -0800 [thread overview]
Message-ID: <4B479202.7080705@sgi.com> (raw)
[PATCH] x86_64 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>
---
arch/x86/kernel/apic/x2apic_uv_x.c | 15 ++++++++-------
1 file changed, 8 insertions(+), 7 deletions(-)
--- linux.orig/arch/x86/kernel/apic/x2apic_uv_x.c
+++ linux/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -377,13 +377,13 @@
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)
@@ -399,7 +399,7 @@
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);
@@ -413,7 +413,7 @@
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)
@@ -423,7 +423,8 @@
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)
next reply other threads:[~2010-01-08 20:14 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-08 20:13 Mike Travis [this message]
2010-01-13 10:37 ` [tip:x86/urgent] x86: SGI UV: Fix mapping of MMIO registers tip-bot for Mike Travis
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