Add NAND environment support for PPC440EPx Sequoia NAND boot config
Patch by Stefan Roese, 12 Sep 2006
This commit is contained in:
Stefan Roese
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a73c8dbb43
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d12ae80889
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@ -2,6 +2,9 @@
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Changes since U-Boot 1.1.4:
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======================================================================
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* Add NAND environment support for PPC440EPx Sequoia NAND boot config
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Patch by Stefan Roese, 12 Sep 2006
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* Update NAND boot documentation
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Patch by Stefan Roese, 12 Sep 2006
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@ -1,5 +1,5 @@
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/*
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* (C) Copyright 2002
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* (C) Copyright 2006
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* See file CREDITS for list of people who contributed to this
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@ -56,6 +56,12 @@ SECTIONS
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cpu/ppc4xx/start.o (.text)
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/* Align to next NAND block */
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. = ALIGN(0x4000);
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common/environment.o (.ppcenv)
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/* Keep some space here for redundant env and potential bad env blocks */
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. = ALIGN(0x10000);
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*(.text)
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*(.fixup)
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*(.got1)
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@ -2,7 +2,7 @@
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* (C) Copyright 2004
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* Jian Zhang, Texas Instruments, jzhang@ti.com.
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* (C) Copyright 2000-2004
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* (C) Copyright 2000-2006
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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@ -76,7 +76,9 @@ env_t *env_ptr = 0;
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/* local functions */
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#if !defined(ENV_IS_EMBEDDED)
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static void use_default(void);
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#endif
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DECLARE_GLOBAL_DATA_PTR;
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@ -91,11 +93,55 @@ uchar env_get_char_spec (int index)
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* Mark it OK for now. env_relocate() in env_common.c
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* will call our relocate function which will does
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* the real validation.
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*
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* When using a NAND boot image (like sequoia_nand), the environment
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* can be embedded or attached to the U-Boot image in NAND flash. This way
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* the SPL loads not only the U-Boot image from NAND but also the
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* environment.
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*/
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int env_init(void)
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{
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#if defined(ENV_IS_EMBEDDED)
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ulong total;
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int crc1_ok = 0, crc2_ok = 0;
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env_t *tmp_env1, *tmp_env2;
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total = CFG_ENV_SIZE;
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tmp_env1 = env_ptr;
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tmp_env2 = (env_t *)((ulong)env_ptr + CFG_ENV_SIZE);
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crc1_ok = (crc32(0, tmp_env1->data, ENV_SIZE) == tmp_env1->crc);
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crc2_ok = (crc32(0, tmp_env2->data, ENV_SIZE) == tmp_env2->crc);
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if (!crc1_ok && !crc2_ok)
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gd->env_valid = 0;
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else if(crc1_ok && !crc2_ok)
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gd->env_valid = 1;
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else if(!crc1_ok && crc2_ok)
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gd->env_valid = 2;
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else {
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/* both ok - check serial */
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if(tmp_env1->flags == 255 && tmp_env2->flags == 0)
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gd->env_valid = 2;
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else if(tmp_env2->flags == 255 && tmp_env1->flags == 0)
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gd->env_valid = 1;
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else if(tmp_env1->flags > tmp_env2->flags)
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gd->env_valid = 1;
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else if(tmp_env2->flags > tmp_env1->flags)
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gd->env_valid = 2;
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else /* flags are equal - almost impossible */
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gd->env_valid = 1;
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}
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if (gd->env_valid == 1)
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env_ptr = tmp_env1;
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else if (gd->env_valid == 2)
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env_ptr = tmp_env2;
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#else /* ENV_IS_EMBEDDED */
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gd->env_addr = (ulong)&default_environment[0];
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gd->env_valid = 1;
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#endif /* ENV_IS_EMBEDDED */
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return (0);
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}
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@ -236,6 +282,7 @@ void env_relocate_spec (void)
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}
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#endif /* CFG_ENV_OFFSET_REDUND */
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#if !defined(ENV_IS_EMBEDDED)
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static void use_default()
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{
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puts ("*** Warning - bad CRC or NAND, using default environment\n\n");
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@ -253,5 +300,6 @@ static void use_default()
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gd->env_valid = 1;
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}
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#endif
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#endif /* CFG_ENV_IS_IN_NAND */
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@ -60,7 +60,8 @@
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defined(CONFIG_RRVISION) || \
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defined(CONFIG_TRAB) || \
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defined(CONFIG_PPCHAMELEONEVB) || \
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defined(CONFIG_M5271EVB)) && \
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defined(CONFIG_M5271EVB) || \
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defined(CONFIG_NAND_U_BOOT)) && \
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defined(ENV_CRC) /* Environment embedded in U-Boot .ppcenv section */
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/* XXX - This only works with GNU C */
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# define __PPCENV__ __attribute__ ((section(".ppcenv")))
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@ -69,14 +69,9 @@
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/*-----------------------------------------------------------------------
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* Initial RAM & stack pointer
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*----------------------------------------------------------------------*/
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#if 0
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/* 440EPx/440GRx have 16KB of internal SRAM, so no need for D-Cache */
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#define CFG_INIT_RAM_DCACHE 1 /* d-cache as init ram */
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#define CFG_INIT_RAM_ADDR 0x70000000 /* DCache */
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#else
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#define CFG_INIT_RAM_OCM 1 /* OCM as init ram */
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#define CFG_INIT_RAM_ADDR CFG_OCM_BASE /* OCM */
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#endif
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#define CFG_INIT_RAM_END (4 << 10)
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#define CFG_GBL_DATA_SIZE 256 /* num bytes initial data */
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@ -98,18 +93,11 @@
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/*-----------------------------------------------------------------------
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* Environment
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*----------------------------------------------------------------------*/
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/*
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* Define here the location of the environment variables (FLASH or EEPROM).
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* Note: DENX encourages to use redundant environment in FLASH.
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*/
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#if 1 /* test-only */
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#if !defined(CONFIG_NAND_U_BOOT) && !defined(CONFIG_NAND_SPL)
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#define CFG_ENV_IS_IN_FLASH 1 /* use FLASH for environment vars */
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#else
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#define CFG_ENV_IS_IN_NAND 1 /* use NAND for environment vars */
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#endif
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#if 0
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#define CFG_ENV_IS_IN_EEPROM 1 /* use EEPROM for environment vars */
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#endif
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/*-----------------------------------------------------------------------
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* FLASH related
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@ -189,8 +177,12 @@
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#undef CFG_NAND_4_ADDR_CYCLE /* No fourth addr used (<=32MB) */
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#ifdef CFG_ENV_IS_IN_NAND
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#define CFG_ENV_SIZE 0x4000
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#define CFG_ENV_OFFSET (CFG_NAND_U_BOOT_OFFS + CFG_NAND_U_BOOT_SIZE)
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/*
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* For NAND booting the environment is embedded in the U-Boot image. Please take
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* look at the file board/amcc/sequoia/u-boot-nand.lds for details.
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*/
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#define CFG_ENV_SIZE CFG_NAND_BLOCK_SIZE
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#define CFG_ENV_OFFSET (CFG_NAND_U_BOOT_OFFS + CFG_ENV_SIZE)
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#define CFG_ENV_OFFSET_REDUND (CFG_ENV_OFFSET + CFG_ENV_SIZE)
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#endif
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@ -214,11 +206,6 @@
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#define CFG_EEPROM_PAGE_WRITE_BITS 3
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#define CFG_EEPROM_PAGE_WRITE_DELAY_MS 10
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#ifdef CFG_ENV_IS_IN_EEPROM
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#define CFG_ENV_SIZE 0x200 /* Size of Environment vars */
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#define CFG_ENV_OFFSET 0x0
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#endif /* CFG_ENV_IS_IN_EEPROM */
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/* I2C SYSMON (LM75, AD7414 is almost compatible) */
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#define CONFIG_DTT_LM75 1 /* ON Semi's LM75 */
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#define CONFIG_DTT_AD7414 1 /* use AD7414 */
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@ -79,6 +79,10 @@
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# ifdef CFG_ENV_OFFSET_REDUND
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# define CFG_REDUNDAND_ENVIRONMENT
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# endif
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# if defined(CONFIG_NAND_U_BOOT)
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/* Use embedded environment in NAND boot versions */
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# define ENV_IS_EMBEDDED 1
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# endif
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#endif /* CFG_ENV_IS_IN_NAND */
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@ -166,8 +166,7 @@ void nand_boot(void)
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/*
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* Load U-Boot image from NAND into RAM
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*/
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ret = nand_load(&nand_info, CFG_NAND_U_BOOT_OFFS,
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CFG_NAND_U_BOOT_SIZE,
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ret = nand_load(&nand_info, CFG_NAND_U_BOOT_OFFS, CFG_NAND_U_BOOT_SIZE,
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(uchar *)CFG_NAND_U_BOOT_DST);
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/*
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