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>
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 @@
}
#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 @@
corenet_tb_init();
#endif
init_used_tlb_cams();
+
+ /* Invalidate the CPC before DDR gets enabled */
+ invalidate_cpc();
}
@@ -198,7 +239,6 @@
* 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 @@
#else
puts("disabled\n");
#endif
+
+ enable_cpc();
+
#ifdef CONFIG_QE
uint qe_base = CONFIG_SYS_IMMR + 0x00080000; /* QE immr base */
qe_init(qe_base);