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authorKumar Gala <galak@kernel.crashing.org>2009-03-19 03:40:08 -0500
committerKumar Gala <galak@kernel.crashing.org>2010-07-26 13:07:56 -0500
commit6aba33e939c41358cf731cbbdd9d5ca59c9266e8 (patch)
treebb817fb19969dc9f7d90e0de0bc6c1a3496aba84 /arch/powerpc/cpu
parentd51cc7a0cd1b9763a3250d44a07032f9b1bc96ae (diff)
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powerpc/p4080: Add support for CPC(Corenet platform cache) on CoreNet platforms
The CoreNet style platforms can have a L3 cache that fronts the memory controllers. Enable that cache as well as add information into the device tree about it. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Dave Liu <daveliu@freescale.com> Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org> Signed-off-by: Roy Zang <tie-fei.zang@freescale.com> Signed-off-by: Timur Tabi <timur@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/cpu')
-rw-r--r--arch/powerpc/cpu/mpc85xx/cpu_init.c45
-rw-r--r--arch/powerpc/cpu/mpc85xx/fdt.c24
2 files changed, 68 insertions, 1 deletions
diff --git a/arch/powerpc/cpu/mpc85xx/cpu_init.c b/arch/powerpc/cpu/mpc85xx/cpu_init.c
index 5d5b4c2..a90ebb1 100644
--- a/arch/powerpc/cpu/mpc85xx/cpu_init.c
+++ b/arch/powerpc/cpu/mpc85xx/cpu_init.c
@@ -127,6 +127,44 @@ void config_8560_ioports (volatile ccsr_cpm_t * cpm)
}
#endif
+#ifdef CONFIG_SYS_FSL_CPC
+static void enable_cpc(void)
+{
+ int i;
+ u32 size = 0;
+
+ cpc_corenet_t *cpc = (cpc_corenet_t *)CONFIG_SYS_FSL_CPC_ADDR;
+
+ for (i = 0; i < CONFIG_SYS_NUM_CPC; i++, cpc++) {
+ u32 cpccfg0 = in_be32(&cpc->cpccfg0);
+ size += CPC_CFG0_SZ_K(cpccfg0);
+
+ out_be32(&cpc->cpccsr0, CPC_CSR0_CE | CPC_CSR0_PE);
+ /* Read back to sync write */
+ in_be32(&cpc->cpccsr0);
+
+ }
+
+ printf("Corenet Platform Cache: %d KB enabled\n", size);
+}
+
+void invalidate_cpc(void)
+{
+ int i;
+ cpc_corenet_t *cpc = (cpc_corenet_t *)CONFIG_SYS_FSL_CPC_ADDR;
+
+ for (i = 0; i < CONFIG_SYS_NUM_CPC; i++, cpc++) {
+ /* Flash invalidate the CPC and clear all the locks */
+ out_be32(&cpc->cpccsr0, CPC_CSR0_FI | CPC_CSR0_LFC);
+ while (in_be32(&cpc->cpccsr0) & (CPC_CSR0_FI | CPC_CSR0_LFC))
+ ;
+ }
+}
+#else
+#define enable_cpc()
+#define invalidate_cpc()
+#endif /* CONFIG_SYS_FSL_CPC */
+
/*
* Breathe some life into the CPU...
*
@@ -188,6 +226,9 @@ void cpu_init_f (void)
corenet_tb_init();
#endif
init_used_tlb_cams();
+
+ /* Invalidate the CPC before DDR gets enabled */
+ invalidate_cpc();
}
@@ -198,7 +239,6 @@ void cpu_init_f (void)
* use the same bit-encoding as the older 8555, etc, parts.
*
*/
-
int cpu_init_r(void)
{
#ifdef CONFIG_SYS_LBC_LCRR
@@ -319,6 +359,9 @@ int cpu_init_r(void)
#else
puts("disabled\n");
#endif
+
+ enable_cpc();
+
#ifdef CONFIG_QE
uint qe_base = CONFIG_SYS_IMMR + 0x00080000; /* QE immr base */
qe_init(qe_base);
diff --git a/arch/powerpc/cpu/mpc85xx/fdt.c b/arch/powerpc/cpu/mpc85xx/fdt.c
index 932466e..6c5fb36 100644
--- a/arch/powerpc/cpu/mpc85xx/fdt.c
+++ b/arch/powerpc/cpu/mpc85xx/fdt.c
@@ -28,6 +28,7 @@
#include <fdt_support.h>
#include <asm/processor.h>
#include <linux/ctype.h>
+#include <asm/io.h>
#ifdef CONFIG_FSL_ESDHC
#include <fsl_esdhc.h>
#endif
@@ -80,7 +81,30 @@ void ft_fixup_cpu(void *blob, u64 memory_limit)
}
#endif
+#ifdef CONFIG_SYS_FSL_CPC
+static inline void ft_fixup_l3cache(void *blob, int off)
+{
+ u32 line_size, num_ways, size, num_sets;
+ cpc_corenet_t *cpc = (void *)CONFIG_SYS_FSL_CPC_ADDR;
+ u32 cfg0 = in_be32(&cpc->cpccfg0);
+
+ size = CPC_CFG0_SZ_K(cfg0) * 1024 * CONFIG_SYS_NUM_CPC;
+ num_ways = CPC_CFG0_NUM_WAYS(cfg0);
+ line_size = CPC_CFG0_LINE_SZ(cfg0);
+ num_sets = size / (line_size * num_ways);
+
+ fdt_setprop(blob, off, "cache-unified", NULL, 0);
+ fdt_setprop_cell(blob, off, "cache-block-size", line_size);
+ fdt_setprop_cell(blob, off, "cache-size", size);
+ fdt_setprop_cell(blob, off, "cache-sets", num_sets);
+ fdt_setprop_cell(blob, off, "cache-level", 3);
+#ifdef CONFIG_SYS_CACHE_STASHING
+ fdt_setprop_cell(blob, off, "cache-stash-id", 1);
+#endif
+}
+#else
#define ft_fixup_l3cache(x, y)
+#endif
#if defined(CONFIG_L2_CACHE)
/* return size in kilobytes */