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-rw-r--r--arch/powerpc/kernel/cpu_setup_44x.S25
-rw-r--r--arch/powerpc/kernel/cputable.c3
2 files changed, 27 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/cpu_setup_44x.S b/arch/powerpc/kernel/cpu_setup_44x.S
index c790634d946b..8e1812e2f3ee 100644
--- a/arch/powerpc/kernel/cpu_setup_44x.S
+++ b/arch/powerpc/kernel/cpu_setup_44x.S
@@ -20,7 +20,14 @@
20_GLOBAL(__setup_cpu_440ep) 20_GLOBAL(__setup_cpu_440ep)
21 b __init_fpu_44x 21 b __init_fpu_44x
22_GLOBAL(__setup_cpu_440epx) 22_GLOBAL(__setup_cpu_440epx)
23 b __init_fpu_44x 23 mflr r4
24 bl __init_fpu_44x
25 bl __plb_disable_wrp
26 mtlr r4
27 blr
28_GLOBAL(__setup_cpu_440grx)
29 b __plb_disable_wrp
30
24 31
25/* enable APU between CPU and FPU */ 32/* enable APU between CPU and FPU */
26_GLOBAL(__init_fpu_44x) 33_GLOBAL(__init_fpu_44x)
@@ -31,3 +38,19 @@ _GLOBAL(__init_fpu_44x)
31 isync 38 isync
32 blr 39 blr
33 40
41/*
42 * Workaround for the incorrect write to DDR SDRAM errata.
43 * The write address can be corrupted during writes to
44 * DDR SDRAM when write pipelining is enabled on PLB0.
45 * Disable write pipelining here.
46 */
47#define DCRN_PLB4A0_ACR 0x81
48
49_GLOBAL(__plb_disable_wrp)
50 mfdcr r3,DCRN_PLB4A0_ACR
51 /* clear WRP bit in PLB4A0_ACR */
52 rlwinm r3,r3,0,8,6
53 mtdcr DCRN_PLB4A0_ACR,r3
54 isync
55 blr
56
diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
index 94d98190e19a..b03a442b7888 100644
--- a/arch/powerpc/kernel/cputable.c
+++ b/arch/powerpc/kernel/cputable.c
@@ -33,6 +33,7 @@ EXPORT_SYMBOL(cur_cpu_spec);
33#ifdef CONFIG_PPC32 33#ifdef CONFIG_PPC32
34extern void __setup_cpu_440ep(unsigned long offset, struct cpu_spec* spec); 34extern void __setup_cpu_440ep(unsigned long offset, struct cpu_spec* spec);
35extern void __setup_cpu_440epx(unsigned long offset, struct cpu_spec* spec); 35extern void __setup_cpu_440epx(unsigned long offset, struct cpu_spec* spec);
36extern void __setup_cpu_440grx(unsigned long offset, struct cpu_spec* spec);
36extern void __setup_cpu_603(unsigned long offset, struct cpu_spec* spec); 37extern void __setup_cpu_603(unsigned long offset, struct cpu_spec* spec);
37extern void __setup_cpu_604(unsigned long offset, struct cpu_spec* spec); 38extern void __setup_cpu_604(unsigned long offset, struct cpu_spec* spec);
38extern void __setup_cpu_750(unsigned long offset, struct cpu_spec* spec); 39extern void __setup_cpu_750(unsigned long offset, struct cpu_spec* spec);
@@ -1146,6 +1147,8 @@ static struct cpu_spec cpu_specs[] = {
1146 .cpu_user_features = COMMON_USER_BOOKE, 1147 .cpu_user_features = COMMON_USER_BOOKE,
1147 .icache_bsize = 32, 1148 .icache_bsize = 32,
1148 .dcache_bsize = 32, 1149 .dcache_bsize = 32,
1150 .cpu_setup = __setup_cpu_440grx,
1151 .platform = "ppc440",
1149 }, 1152 },
1150 { /* 440GP Rev. B */ 1153 { /* 440GP Rev. B */
1151 .pvr_mask = 0xf0000fff, 1154 .pvr_mask = 0xf0000fff,