[U-Boot] [PATCH 1/2] P4080/PBL: add support for boot from SPI flash.
Shaohui Xie
b21989 at freescale.com
Wed Mar 16 03:10:32 CET 2011
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 at freescale.com>
Signed-off-by: Mingkai Hu <Mingkai.hu at freescale.com>
Signed-off-by: Shaohui Xie <b21989 at freescale.com>
Signed-off-by: Roy Zang <tie-fei.zang at freescale.com>
---
arch/powerpc/cpu/mpc85xx/cpu_init.c | 19 +++++++++++++++++++
board/freescale/corenet_ds/tlb.c | 12 +++++++++++-
boards.cfg | 1 +
include/configs/corenet_ds.h | 27 ++++++++++++++++++++++++++-
4 files changed, 57 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/cpu/mpc85xx/cpu_init.c b/arch/powerpc/cpu/mpc85xx/cpu_init.c
index 8ece970..a977000 100644
--- a/arch/powerpc/cpu/mpc85xx/cpu_init.c
+++ b/arch/powerpc/cpu/mpc85xx/cpu_init.c
@@ -141,6 +141,22 @@ static void enable_cpc(void)
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);
@@ -164,6 +180,9 @@ void invalidate_cpc(void)
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))
diff --git a/board/freescale/corenet_ds/tlb.c b/board/freescale/corenet_ds/tlb.c
index 1ae0416..fe77e79 100644
--- a/board/freescale/corenet_ds/tlb.c
+++ b/board/freescale/corenet_ds/tlb.c
@@ -1,5 +1,5 @@
/*
- * Copyright 2008-2010 Freescale Semiconductor, Inc.
+ * Copyright 2008-2011 Freescale Semiconductor, Inc.
*
* (C) Copyright 2000
* Wolfgang Denk, DENX Software Engineering, wd at denx.de.
@@ -51,9 +51,19 @@ struct fsl_e_tlb_entry tlb_table[] = {
/* TLB 1 */
/* *I*** - Covers boot page */
+#if defined(CONFIG_SYS_RAMBOOT) && defined(CONFIG_SYS_INIT_L3_ADDR)
+ /*
+ * *I*G - L3SRAM. When L3 is used as 1M SRAM, the address of the
+ * SRAM is at 0xfff00000, it covered the 0xfffff000.
+ */
+ SET_TLB_ENTRY(1, CONFIG_SYS_INIT_L3_ADDR, CONFIG_SYS_INIT_L3_ADDR,
+ MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G,
+ 0, 0, BOOKE_PAGESZ_1M, 1),
+#else
SET_TLB_ENTRY(1, 0xfffff000, 0xfffff000,
MAS3_SX|MAS3_SW|MAS3_SR, MAS2_I|MAS2_G,
0, 0, BOOKE_PAGESZ_4K, 1),
+#endif
/* *I*G* - CCSRBAR */
SET_TLB_ENTRY(1, CONFIG_SYS_CCSRBAR, CONFIG_SYS_CCSRBAR_PHYS,
diff --git a/boards.cfg b/boards.cfg
index 45c3102..f19cc34 100644
--- a/boards.cfg
+++ b/boards.cfg
@@ -529,6 +529,7 @@ P2020RDB_NAND powerpc mpc85xx p1_p2_rdb freesca
P2020RDB_SDCARD powerpc mpc85xx p1_p2_rdb freescale - P1_P2_RDB:P2020RDB,SDCARD
P2020RDB_SPIFLASH powerpc mpc85xx p1_p2_rdb freescale - P1_P2_RDB:P2020RDB,SPIFLASH
P4080DS powerpc mpc85xx corenet_ds freescale
+P4080DS_RAMBOOT_PBL powerpc mpc85xx corenet_ds freescale - P4080DS:RAMBOOT_PBL,SYS_TEXT_BASE=0xFFF80000
mpq101 powerpc mpc85xx mpq101 mercury - mpq101
stxgp3 powerpc mpc85xx stxgp3 stx
stxssa powerpc mpc85xx stxssa stx - stxssa
diff --git a/include/configs/corenet_ds.h b/include/configs/corenet_ds.h
index bff212e..8d10862 100644
--- a/include/configs/corenet_ds.h
+++ b/include/configs/corenet_ds.h
@@ -28,6 +28,11 @@
#include "../board/freescale/common/ics307_clk.h"
+#ifdef CONFIG_RAMBOOT_PBL
+#define CONFIG_RAMBOOT_TEXT_BASE CONFIG_SYS_TEXT_BASE
+#define CONFIG_RESET_VECTOR_ADDRESS 0xfffffffc
+#endif
+
/* High Level Configuration Options */
#define CONFIG_BOOKE
#define CONFIG_E500 /* BOOKE e500 family */
@@ -63,12 +68,17 @@
#define CONFIG_ENV_OVERWRITE
+#if defined(CONFIG_RAMBOOT_PBL)
+ #define CONFIG_SYS_NO_FLASH /* Store ENV in memory only */
+#endif
+
#ifdef CONFIG_SYS_NO_FLASH
#define CONFIG_ENV_IS_NOWHERE
#else
#define CONFIG_ENV_IS_IN_FLASH
#define CONFIG_FLASH_CFI_DRIVER
#define CONFIG_SYS_FLASH_CFI
+#define CONFIG_ENV_ADDR (CONFIG_SYS_MONITOR_BASE - CONFIG_ENV_SECT_SIZE)
#endif
#define CONFIG_SYS_CLK_FREQ get_board_sys_clk() /* sysclk for MPC85xx */
@@ -100,6 +110,18 @@
#define CONFIG_PANIC_HANG /* do not reset board on panic */
/*
+ * Config the L3 Cache as L3 SRAM
+ */
+#define CONFIG_SYS_INIT_L3_ADDR CONFIG_RAMBOOT_TEXT_BASE
+#ifdef CONFIG_PHYS_64BIT
+#define CONFIG_SYS_INIT_L3_ADDR_PHYS (0xf00000000ull | CONFIG_RAMBOOT_TEXT_BASE)
+#else
+#define CONFIG_SYS_INIT_L3_ADDR_PHYS CONFIG_SYS_INIT_L3_ADDR
+#endif
+#define CONFIG_SYS_L3_SIZE (1024 << 10)
+#define CONFIG_SYS_INIT_L3_END (CONFIG_SYS_INIT_L3_ADDR + CONFIG_SYS_L3_SIZE)
+
+/*
* Base addresses -- Note these are effective addresses where the
* actual resources get mapped (not physical addresses)
*/
@@ -192,6 +214,10 @@
#define CONFIG_SYS_MONITOR_BASE CONFIG_SYS_TEXT_BASE /* start of monitor */
+#if defined(CONFIG_RAMBOOT_PBL)
+#define CONFIG_SYS_RAMBOOT
+#endif
+
#define CONFIG_SYS_FLASH_EMPTY_INFO
#define CONFIG_SYS_FLASH_AMD_CHECK_DQ7
#define CONFIG_SYS_FLASH_BANKS_LIST {CONFIG_SYS_FLASH_BASE_PHYS + 0x8000000, CONFIG_SYS_FLASH_BASE_PHYS}
@@ -461,7 +487,6 @@
/*
* Environment
*/
-#define CONFIG_ENV_ADDR (CONFIG_SYS_MONITOR_BASE - CONFIG_ENV_SECT_SIZE)
#define CONFIG_ENV_SIZE 0x2000
#define CONFIG_ENV_SECT_SIZE 0x20000 /* 128K (one sector) */
--
1.6.4
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