[U-Boot] [PATCH V5] nand_spl_simple: store ecc data on the stack

Stefano Babic
2011-12-15T09:55:37Z

Currently nand_spl_simple puts it's temp data at 0x10000 offset in SDRAM
which is likely to contain already loaded data.
The patch saves the oob data and the ecc on the stack replacing
the fixed address in RAM.

Signed-off-by: Stefano Babic <sbabic@denx.de>
CC: Ilya Yanok <yanok@emcraft.com>
CC: Scott Wood <scottwood@freescale.com>
CC: Tom Rini <tom.rini@gmail.com>
CC: Simon Schwarz <simonschwarzcor@googlemail.com>
CC: Wolfgang Denk <wd@denx.de>
---

V5:
- no changes, rebased on current u-boot-ti

V4:
- Drop SYS_ from local defines (Wolfgang Denk, Scott Wood)
- drop parenthesis around defines (Scott Wood)

V3:
- use local defines for CONFIG_SYS_NAND_ECCSTEPS and
CONFIG_SYS_NAND_ECCTOTAL (Tom Rini)
- drop CONFIG_SYS_NAND_ECCSTEPS from board config files

V2:
- CONFIG_SYS_NAND_ECCTOTAL can always be computed (Ilya Yanok)
- drop all CONFIG_SYS_NAND_ECCTOTAL in arm boards using nand_simple.c

drivers/mtd/nand/nand_spl_simple.c | 42 ++++++++++++-------------------
include/configs/am3517_crane.h | 4 ---
include/configs/am3517_evm.h | 4 ---
include/configs/devkit8000.h | 5 ----
include/configs/hawkboard.h | 5 +---
include/configs/omap3_beagle.h | 4 ---
include/configs/omap3_evm.h | 4 ---
include/configs/omap3_evm_quick_nand.h | 4 ---
8 files changed, 17 insertions(+), 55 deletions(-)

diff --git a/drivers/mtd/nand/nand_spl_simple.c b/drivers/mtd/nand/nand_spl_simple.c
index 7eb08a3..4a4d02f 100644
--- a/drivers/mtd/nand/nand_spl_simple.c
+++ b/drivers/mtd/nand/nand_spl_simple.c
@@ -27,6 +27,11 @@ static int nand_ecc_pos[] = CONFIG_SYS_NAND_ECCPOS;
static nand_info_t mtd;
static struct nand_chip nand_chip;

+#define ECCSTEPS (CONFIG_SYS_NAND_PAGE_SIZE / \
+ CONFIG_SYS_NAND_ECCSIZE)
+#define ECCTOTAL (ECCSTEPS * CONFIG_SYS_NAND_ECCBYTES)
+
+
#if (CONFIG_SYS_NAND_PAGE_SIZE <= 512)
/*
* NAND command for small page NAND devices (512)
@@ -145,29 +150,21 @@ static int nand_is_bad_block(int block)
static int nand_read_page(int block, int page, uchar *dst)
{
struct nand_chip *this = mtd.priv;
- u_char *ecc_calc;
- u_char *ecc_code;
- u_char *oob_data;
+ u_char ecc_calc[ECCTOTAL];
+ u_char ecc_code[ECCTOTAL];
+ u_char oob_data[CONFIG_SYS_NAND_OOBSIZE];
int i;
int eccsize = CONFIG_SYS_NAND_ECCSIZE;
int eccbytes = CONFIG_SYS_NAND_ECCBYTES;
- int eccsteps = CONFIG_SYS_NAND_ECCSTEPS;
+ int eccsteps = ECCSTEPS;
uint8_t *p = dst;

- /*
- * No malloc available for now, just use some temporary locations
- * in SDRAM
- */
- ecc_calc = (u_char *)(CONFIG_SYS_SDRAM_BASE + 0x10000);
- ecc_code = ecc_calc + 0x100;
- oob_data = ecc_calc + 0x200;
-
nand_command(block, page, 0, NAND_CMD_READOOB);
this->read_buf(&mtd, oob_data, CONFIG_SYS_NAND_OOBSIZE);
nand_command(block, page, 0, NAND_CMD_READ0);

/* Pick the ECC bytes out of the oob data */
- for (i = 0; i < CONFIG_SYS_NAND_ECCTOTAL; i++)
+ for (i = 0; i < ECCTOTAL; i++)
ecc_code[i] = oob_data[nand_ecc_pos[i]];

@@ -184,24 +181,17 @@ static int nand_read_page(int block, int page, uchar *dst)
static int nand_read_page(int block, int page, void *dst)
{
struct nand_chip *this = mtd.priv;
- u_char *ecc_calc;
- u_char *ecc_code;
- u_char *oob_data;
+ u_char ecc_calc[ECCTOTAL];
+ u_char ecc_code[ECCTOTAL];
+ u_char oob_data[CONFIG_SYS_NAND_OOBSIZE];
int i;
int eccsize = CONFIG_SYS_NAND_ECCSIZE;
int eccbytes = CONFIG_SYS_NAND_ECCBYTES;
- int eccsteps = CONFIG_SYS_NAND_ECCSTEPS;
+ int eccsteps = ECCSTEPS;
uint8_t *p = dst;

nand_command(block, page, 0, NAND_CMD_READ0);

- /* No malloc available for now, just use some temporary locations
- * in SDRAM
- */
- ecc_calc = (u_char *)(CONFIG_SYS_SDRAM_BASE + 0x10000);
- ecc_code = ecc_calc + 0x100;
- oob_data = ecc_calc + 0x200;
-
for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
if (this->ecc.mode != NAND_ECC_SOFT)
this->ecc.hwctl(&mtd, NAND_ECC_READ);
@@ -211,10 +201,10 @@ static int nand_read_page(int block, int page, void *dst)
this->read_buf(&mtd, oob_data, CONFIG_SYS_NAND_OOBSIZE);

/* Pick the ECC bytes out of the oob data */
- for (i = 0; i < CONFIG_SYS_NAND_ECCTOTAL; i++)
+ for (i = 0; i < ECCTOTAL; i++)
ecc_code[i] = oob_data[nand_ecc_pos[i]];

- eccsteps = CONFIG_SYS_NAND_ECCSTEPS;
+ eccsteps = ECCSTEPS;
p = dst;

for (i = 0 ; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
diff --git a/include/configs/am3517_crane.h b/include/configs/am3517_crane.h
index 0a0c261..b0dd2f0 100644
--- a/include/configs/am3517_crane.h
+++ b/include/configs/am3517_crane.h
@@ -359,10 +359,6 @@
10, 11, 12, 13}
#define CONFIG_SYS_NAND_ECCSIZE 512
#define CONFIG_SYS_NAND_ECCBYTES 3
-#define CONFIG_SYS_NAND_ECCSTEPS (CONFIG_SYS_NAND_PAGE_SIZE / \
- CONFIG_SYS_NAND_ECCSIZE)
-#define CONFIG_SYS_NAND_ECCTOTAL (CONFIG_SYS_NAND_ECCBYTES * \
- CONFIG_SYS_NAND_ECCSTEPS)
#define CONFIG_SYS_NAND_U_BOOT_START CONFIG_SYS_TEXT_BASE
#define CONFIG_SYS_NAND_U_BOOT_OFFS 0x80000

diff --git a/include/configs/am3517_evm.h b/include/configs/am3517_evm.h
index d44eeec..f797f3f 100644
--- a/include/configs/am3517_evm.h
+++ b/include/configs/am3517_evm.h
@@ -360,10 +360,6 @@
10, 11, 12, 13}
#define CONFIG_SYS_NAND_ECCSIZE 512
#define CONFIG_SYS_NAND_ECCBYTES 3
-#define CONFIG_SYS_NAND_ECCSTEPS (CONFIG_SYS_NAND_PAGE_SIZE / \
- CONFIG_SYS_NAND_ECCSIZE)
-#define CONFIG_SYS_NAND_ECCTOTAL (CONFIG_SYS_NAND_ECCBYTES * \
- CONFIG_SYS_NAND_ECCSTEPS)
#define CONFIG_SYS_NAND_U_BOOT_START CONFIG_SYS_TEXT_BASE
#define CONFIG_SYS_NAND_U_BOOT_OFFS 0x80000

diff --git a/include/configs/devkit8000.h b/include/configs/devkit8000.h
index 758326b..2b6a6ee 100644
--- a/include/configs/devkit8000.h
+++ b/include/configs/devkit8000.h
@@ -343,11 +343,6 @@
#define CONFIG_SYS_NAND_ECCSIZE 512
#define CONFIG_SYS_NAND_ECCBYTES 3

-#define CONFIG_SYS_NAND_ECCSTEPS (CONFIG_SYS_NAND_PAGE_SIZE / \
- CONFIG_SYS_NAND_ECCSIZE)
-#define CONFIG_SYS_NAND_ECCTOTAL (CONFIG_SYS_NAND_ECCBYTES * \
- CONFIG_SYS_NAND_ECCSTEPS)
-
#define CONFIG_SYS_NAND_U_BOOT_START CONFIG_SYS_TEXT_BASE

#define CONFIG_SYS_NAND_U_BOOT_OFFS 0x80000
diff --git a/include/configs/hawkboard.h b/include/configs/hawkboard.h
index 12acb27..65b3b78 100644
--- a/include/configs/hawkboard.h
+++ b/include/configs/hawkboard.h
@@ -138,11 +138,8 @@
#define CONFIG_SYS_NAND_BAD_BLOCK_POS 0
#define CONFIG_SYS_NAND_ECCSIZE 512
#define CONFIG_SYS_NAND_ECCBYTES 10
-#define CONFIG_SYS_NAND_ECCSTEPS (CONFIG_SYS_NAND_PAGE_SIZE / \
- CONFIG_SYS_NAND_ECCSIZE)
#define CONFIG_SYS_NAND_OOBSIZE 64
-#define CONFIG_SYS_NAND_ECCTOTAL (CONFIG_SYS_NAND_ECCBYTES * \
- CONFIG_SYS_NAND_ECCSTEPS)
+
#endif /* CONFIG_SYS_USE_NAND */

/*
diff --git a/include/configs/omap3_beagle.h b/include/configs/omap3_beagle.h
index 91af8a0..4c7a686 100644
--- a/include/configs/omap3_beagle.h
+++ b/include/configs/omap3_beagle.h
@@ -418,10 +418,6 @@
10, 11, 12, 13}
#define CONFIG_SYS_NAND_ECCSIZE 512
#define CONFIG_SYS_NAND_ECCBYTES 3
-#define CONFIG_SYS_NAND_ECCSTEPS (CONFIG_SYS_NAND_PAGE_SIZE / \
- CONFIG_SYS_NAND_ECCSIZE)
-#define CONFIG_SYS_NAND_ECCTOTAL (CONFIG_SYS_NAND_ECCBYTES * \
- CONFIG_SYS_NAND_ECCSTEPS)
#define CONFIG_SYS_NAND_U_BOOT_START CONFIG_SYS_TEXT_BASE
#define CONFIG_SYS_NAND_U_BOOT_OFFS 0x80000

diff --git a/include/configs/omap3_evm.h b/include/configs/omap3_evm.h
index 2ce3959..1fcb7af 100644
--- a/include/configs/omap3_evm.h
+++ b/include/configs/omap3_evm.h
@@ -121,10 +121,6 @@
10, 11, 12, 13}
#define CONFIG_SYS_NAND_ECCSIZE 512
#define CONFIG_SYS_NAND_ECCBYTES 3
-#define CONFIG_SYS_NAND_ECCSTEPS (CONFIG_SYS_NAND_PAGE_SIZE / \
- CONFIG_SYS_NAND_ECCSIZE)
-#define CONFIG_SYS_NAND_ECCTOTAL (CONFIG_SYS_NAND_ECCBYTES * \
- CONFIG_SYS_NAND_ECCSTEPS)
#define CONFIG_SYS_NAND_U_BOOT_START CONFIG_SYS_TEXT_BASE
#define CONFIG_SYS_NAND_U_BOOT_OFFS 0x80000

diff --git a/include/configs/omap3_evm_quick_nand.h b/include/configs/omap3_evm_quick_nand.h
index 2f879c0..362fa1d 100644
--- a/include/configs/omap3_evm_quick_nand.h
+++ b/include/configs/omap3_evm_quick_nand.h
@@ -91,10 +91,6 @@
10, 11, 12, 13}
#define CONFIG_SYS_NAND_ECCSIZE 512
#define CONFIG_SYS_NAND_ECCBYTES 3
-#define CONFIG_SYS_NAND_ECCSTEPS (CONFIG_SYS_NAND_PAGE_SIZE / \
- CONFIG_SYS_NAND_ECCSIZE)
-#define CONFIG_SYS_NAND_ECCTOTAL (CONFIG_SYS_NAND_ECCBYTES * \
- CONFIG_SYS_NAND_ECCSTEPS)
#define CONFIG_SYS_NAND_U_BOOT_START CONFIG_SYS_TEXT_BASE
#define CONFIG_SYS_NAND_U_BOOT_OFFS 0x80000

--
1.7.5.4