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authorKumar Gala <galak@kernel.crashing.org>2009-03-19 09:16:10 -0500
committerKumar Gala <galak@kernel.crashing.org>2009-03-30 13:33:50 -0500
commit1b3e4044a28a3d95b0aad41bdc52482bb2cc9b2b (patch)
treee81d608df798c58a5d2a35204ef6891fb2bc0bd8 /cpu/mpc85xx
parentc360ceac0286159f94d9d1a9496fc9858c8d9bec (diff)
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85xx: Add support for additional e500mc features
* Enable backside L2 * e500mc no longer has timebase enable in HID (moved to CCSR register) Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'cpu/mpc85xx')
-rw-r--r--cpu/mpc85xx/cpu_init.c13
-rw-r--r--cpu/mpc85xx/fdt.c64
-rw-r--r--cpu/mpc85xx/release.S16
-rw-r--r--cpu/mpc85xx/start.S2
4 files changed, 94 insertions, 1 deletions
diff --git a/cpu/mpc85xx/cpu_init.c b/cpu/mpc85xx/cpu_init.c
index 0b7c609..c98dd8d 100644
--- a/cpu/mpc85xx/cpu_init.c
+++ b/cpu/mpc85xx/cpu_init.c
@@ -345,6 +345,19 @@ int cpu_init_r(void)
asm("msync;isync");
puts("enabled\n");
}
+#elif defined(CONFIG_BACKSIDE_L2_CACHE)
+ u32 l2cfg0 = mfspr(SPRN_L2CFG0);
+
+ /* invalidate the L2 cache */
+ mtspr(SPRN_L2CSR0, L2CSR0_L2FI);
+ while (mfspr(SPRN_L2CSR0) & L2CSR0_L2FI)
+ ;
+
+ /* enable the cache */
+ mtspr(SPRN_L2CSR0, CONFIG_SYS_INIT_L2CSR0);
+
+ if (CONFIG_SYS_INIT_L2CSR0 & L2CSR0_L2E)
+ printf("%d KB enabled\n", (l2cfg0 & 0x3fff) * 64);
#else
puts("disabled\n");
#endif
diff --git a/cpu/mpc85xx/fdt.c b/cpu/mpc85xx/fdt.c
index 1fae47c..2d36c24 100644
--- a/cpu/mpc85xx/fdt.c
+++ b/cpu/mpc85xx/fdt.c
@@ -80,7 +80,9 @@ void ft_fixup_cpu(void *blob, u64 memory_limit)
}
#endif
-#ifdef CONFIG_L2_CACHE
+#define ft_fixup_l3cache(x, y)
+
+#if defined(CONFIG_L2_CACHE)
/* return size in kilobytes */
static inline u32 l2cache_size(void)
{
@@ -157,6 +159,66 @@ static inline void ft_fixup_l2cache(void *blob)
fdt_setprop_cell(blob, off, "cache-sets", num_sets);
fdt_setprop_cell(blob, off, "cache-level", 2);
fdt_setprop(blob, off, "compatible", compat_buf, sizeof(compat_buf));
+
+ /* we dont bother w/L3 since no platform of this type has one */
+}
+#elif defined(CONFIG_BACKSIDE_L2_CACHE)
+static inline void ft_fixup_l2cache(void *blob)
+{
+ int off, l2_off, l3_off = -1;
+ u32 *ph;
+ u32 l2cfg0 = mfspr(SPRN_L2CFG0);
+ u32 size, line_size, num_ways, num_sets;
+
+ size = (l2cfg0 & 0x3fff) * 64 * 1024;
+ num_ways = ((l2cfg0 >> 14) & 0x1f) + 1;
+ line_size = (((l2cfg0 >> 23) & 0x3) + 1) * 32;
+ num_sets = size / (line_size * num_ways);
+
+ off = fdt_node_offset_by_prop_value(blob, -1, "device_type", "cpu", 4);
+
+ while (off != -FDT_ERR_NOTFOUND) {
+ ph = (u32 *)fdt_getprop(blob, off, "next-level-cache", 0);
+
+ if (ph == NULL) {
+ debug("no next-level-cache property\n");
+ goto next;
+ }
+
+ l2_off = fdt_node_offset_by_phandle(blob, *ph);
+ if (l2_off < 0) {
+ printf("%s: %s\n", __func__, fdt_strerror(off));
+ goto next;
+ }
+
+ fdt_setprop(blob, l2_off, "cache-unified", NULL, 0);
+ fdt_setprop_cell(blob, l2_off, "cache-block-size", line_size);
+ fdt_setprop_cell(blob, l2_off, "cache-size", size);
+ fdt_setprop_cell(blob, l2_off, "cache-sets", num_sets);
+ fdt_setprop_cell(blob, l2_off, "cache-level", 2);
+ fdt_setprop(blob, l2_off, "compatible", "cache", 6);
+
+ if (l3_off < 0) {
+ ph = (u32 *)fdt_getprop(blob, l2_off, "next-level-cache", 0);
+
+ if (ph == NULL) {
+ debug("no next-level-cache property\n");
+ goto next;
+ }
+ l3_off = *ph;
+ }
+next:
+ off = fdt_node_offset_by_prop_value(blob, off,
+ "device_type", "cpu", 4);
+ }
+ if (l3_off > 0) {
+ l3_off = fdt_node_offset_by_phandle(blob, l3_off);
+ if (l3_off < 0) {
+ printf("%s: %s\n", __func__, fdt_strerror(off));
+ return ;
+ }
+ ft_fixup_l3cache(blob, l3_off);
+ }
}
#else
#define ft_fixup_l2cache(x)
diff --git a/cpu/mpc85xx/release.S b/cpu/mpc85xx/release.S
index 54c936c..fbefc2c 100644
--- a/cpu/mpc85xx/release.S
+++ b/cpu/mpc85xx/release.S
@@ -76,6 +76,22 @@ __secondary_start_page:
slwi r8,r4,5
add r10,r3,r8
+#ifdef CONFIG_BACKSIDE_L2_CACHE
+ /* Enable/invalidate the L2 cache */
+ msync
+ lis r3,L2CSR0_L2FI@h
+ mtspr SPRN_L2CSR0,r3
+1:
+ mfspr r3,SPRN_L2CSR0
+ andis. r1,r3,L2CSR0_L2FI@h
+ bne 1b
+
+ lis r3,CONFIG_SYS_INIT_L2CSR0@h
+ ori r3,r3,CONFIG_SYS_INIT_L2CSR0@l
+ mtspr SPRN_L2CSR0,r3
+ isync
+#endif
+
#define EPAPR_MAGIC (0x45504150)
#define ENTRY_ADDR_UPPER 0
#define ENTRY_ADDR_LOWER 4
diff --git a/cpu/mpc85xx/start.S b/cpu/mpc85xx/start.S
index 80f9677..89eea8c 100644
--- a/cpu/mpc85xx/start.S
+++ b/cpu/mpc85xx/start.S
@@ -161,7 +161,9 @@ _start_e500:
#if defined(CONFIG_ENABLE_36BIT_PHYS)
ori r0,r0,HID0_ENMAS7@l /* Enable MAS7 */
#endif
+#ifndef CONFIG_E500MC
ori r0,r0,HID0_TBEN@l /* Enable Timebase */
+#endif
mtspr HID0,r0
#ifndef CONFIG_E500MC