powerpc/85xx: Add PBL boot from SPI flash support on P4080DS
PBL(pre-boot loader): SPI flash used as RCW(Reset Configuration Word) and
PBI(pre-boot initialization) source, CPC(CoreNet Platform Cache) used as
1M SRAM where PBL will copy whole U-BOOT image to, U-boot can boot from
CPC after PBL completes RCW and PBI phases.
Signed-off-by: Chunhe Lan <b25806@freescale.com>
Signed-off-by: Mingkai Hu <Mingkai.hu@freescale.com>
Signed-off-by: Shaohui Xie <b21989@freescale.com>
Signed-off-by: Roy Zang <tie-fei.zang@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 5642cd7..6f256cf 100644
--- a/arch/powerpc/cpu/mpc85xx/cpu_init.c
+++ b/arch/powerpc/cpu/mpc85xx/cpu_init.c
@@ -145,6 +145,22 @@
for (i = 0; i < CONFIG_SYS_NUM_CPC; i++, cpc++) {
u32 cpccfg0 = in_be32(&cpc->cpccfg0);
size += CPC_CFG0_SZ_K(cpccfg0);
+#ifdef CONFIG_RAMBOOT_PBL
+ if (in_be32(&cpc->cpcsrcr0) & CPC_SRCR0_SRAMEN) {
+ /* find and disable LAW of SRAM */
+ struct law_entry law = find_law(CONFIG_SYS_INIT_L3_ADDR);
+
+ if (law.index == -1) {
+ printf("\nFatal error happened\n");
+ return;
+ }
+ disable_law(law.index);
+
+ clrbits_be32(&cpc->cpchdbcr0, CPC_HDBCR0_CDQ_SPEC_DIS);
+ out_be32(&cpc->cpccsr0, 0);
+ out_be32(&cpc->cpcsrcr0, 0);
+ }
+#endif
#ifdef CONFIG_SYS_FSL_ERRATUM_CPC_A002
setbits_be32(&cpc->cpchdbcr0, CPC_HDBCR0_TAG_ECC_SCRUB_DIS);
@@ -168,6 +184,9 @@
cpc_corenet_t *cpc = (cpc_corenet_t *)CONFIG_SYS_FSL_CPC_ADDR;
for (i = 0; i < CONFIG_SYS_NUM_CPC; i++, cpc++) {
+ /* skip CPC when it used as all SRAM */
+ if (in_be32(&cpc->cpcsrcr0) & CPC_SRCR0_SRAMEN)
+ continue;
/* 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))