mirror of
https://github.com/AsahiLinux/u-boot
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9c46e71af2
If the memory layout pushes the stack out of the default DCPLB coverage, the exception handler may trigger a double fault by trying to push onto the uncovered stack. So handle the exception stack similar to the kernel by using the top of the scratch pad SRAM. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
149 lines
4.2 KiB
C
149 lines
4.2 KiB
C
/*
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* config.h - setup common defines for Blackfin boards based on config.h
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*
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* Copyright (c) 2007-2009 Analog Devices Inc.
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*
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* Licensed under the GPL-2 or later.
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*/
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#ifndef __ASM_BLACKFIN_CONFIG_POST_H__
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#define __ASM_BLACKFIN_CONFIG_POST_H__
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/* Sanity check CONFIG_BFIN_CPU */
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#ifndef CONFIG_BFIN_CPU
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# error CONFIG_BFIN_CPU: your board config needs to define this
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#endif
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#ifndef CONFIG_BFIN_SCRATCH_REG
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# define CONFIG_BFIN_SCRATCH_REG retn
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#endif
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/* Make sure the structure is properly aligned */
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#if ((CONFIG_SYS_GBL_DATA_ADDR & -4) != CONFIG_SYS_GBL_DATA_ADDR)
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# error CONFIG_SYS_GBL_DATA_ADDR: must be 4 byte aligned
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#endif
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/* Set default CONFIG_VCO_HZ if need be */
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#if !defined(CONFIG_VCO_HZ)
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# if (CONFIG_CLKIN_HALF == 0)
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# define CONFIG_VCO_HZ (CONFIG_CLKIN_HZ * CONFIG_VCO_MULT)
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# else
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# define CONFIG_VCO_HZ ((CONFIG_CLKIN_HZ * CONFIG_VCO_MULT) / 2)
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# endif
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#endif
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/* Set default CONFIG_CCLK_HZ if need be */
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#if !defined(CONFIG_CCLK_HZ)
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# if (CONFIG_PLL_BYPASS == 0)
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# define CONFIG_CCLK_HZ (CONFIG_VCO_HZ / CONFIG_CCLK_DIV)
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# else
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# define CONFIG_CCLK_HZ CONFIG_CLKIN_HZ
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# endif
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#endif
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/* Set default CONFIG_SCLK_HZ if need be */
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#if !defined(CONFIG_SCLK_HZ)
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# if (CONFIG_PLL_BYPASS == 0)
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# define CONFIG_SCLK_HZ (CONFIG_VCO_HZ / CONFIG_SCLK_DIV)
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# else
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# define CONFIG_SCLK_HZ CONFIG_CLKIN_HZ
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# endif
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#endif
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/* Since we use these to program PLL registers directly,
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* make sure the values are sane and won't screw us up.
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*/
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#if (CONFIG_VCO_MULT & 0x3F) != CONFIG_VCO_MULT
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# error CONFIG_VCO_MULT: Invalid value: must fit in 6 bits (0 - 63)
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#endif
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#if (CONFIG_CLKIN_HALF & 0x1) != CONFIG_CLKIN_HALF
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# error CONFIG_CLKIN_HALF: Invalid value: must be 0 or 1
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#endif
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#if (CONFIG_PLL_BYPASS & 0x1) != CONFIG_PLL_BYPASS
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# error CONFIG_PLL_BYPASS: Invalid value: must be 0 or 1
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#endif
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/* Using L1 scratch pad makes sense for everyone by default. */
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#ifndef CONFIG_LINUX_CMDLINE_ADDR
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# define CONFIG_LINUX_CMDLINE_ADDR L1_SRAM_SCRATCH
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#endif
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#ifndef CONFIG_LINUX_CMDLINE_SIZE
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# define CONFIG_LINUX_CMDLINE_SIZE L1_SRAM_SCRATCH_SIZE
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#endif
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/* Set default SPI flash CS to the one we boot from */
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#if defined(CONFIG_ENV_IS_IN_SPI_FLASH) && !defined(CONFIG_ENV_SPI_CS)
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# define CONFIG_ENV_SPI_CS BFIN_BOOT_SPI_SSEL
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#endif
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/* Default/common Blackfin memory layout */
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#ifndef CONFIG_SYS_SDRAM_BASE
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# define CONFIG_SYS_SDRAM_BASE 0
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#endif
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#ifndef CONFIG_SYS_MAX_RAM_SIZE
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# define CONFIG_SYS_MAX_RAM_SIZE (CONFIG_MEM_SIZE * 1024 * 1024)
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#endif
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#ifndef CONFIG_SYS_MONITOR_BASE
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# define CONFIG_SYS_MONITOR_BASE (CONFIG_SYS_MAX_RAM_SIZE - CONFIG_SYS_MONITOR_LEN)
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#endif
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#ifndef CONFIG_SYS_MALLOC_BASE
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# define CONFIG_SYS_MALLOC_BASE (CONFIG_SYS_MONITOR_BASE - CONFIG_SYS_MALLOC_LEN)
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#endif
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#ifndef CONFIG_SYS_GBL_DATA_SIZE
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# define CONFIG_SYS_GBL_DATA_SIZE (128)
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#endif
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#ifndef CONFIG_SYS_GBL_DATA_ADDR
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# define CONFIG_SYS_GBL_DATA_ADDR (CONFIG_SYS_MALLOC_BASE - CONFIG_SYS_GBL_DATA_SIZE)
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#endif
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#ifndef CONFIG_STACKBASE
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# define CONFIG_STACKBASE (CONFIG_SYS_GBL_DATA_ADDR - 4)
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#endif
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#ifndef CONFIG_SYS_MEMTEST_START
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# define CONFIG_SYS_MEMTEST_START 0
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#endif
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#ifndef CONFIG_SYS_MEMTEST_END
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# define CONFIG_SYS_MEMTEST_END (CONFIG_STACKBASE - 8192 + 4)
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#endif
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/* Check to make sure everything fits in external RAM */
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#if ((CONFIG_SYS_MONITOR_BASE + CONFIG_SYS_MONITOR_LEN) > CONFIG_SYS_MAX_RAM_SIZE)
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# error Memory Map does not fit into configuration
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#endif
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/* Default/common Blackfin environment settings */
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#ifndef CONFIG_LOADADDR
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# define CONFIG_LOADADDR 0x1000000
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#endif
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#ifndef CONFIG_SYS_LOAD_ADDR
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# define CONFIG_SYS_LOAD_ADDR CONFIG_LOADADDR
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#endif
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#ifndef CONFIG_SYS_BOOTM_LEN
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# define CONFIG_SYS_BOOTM_LEN 0x4000000
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#endif
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#ifndef CONFIG_SYS_PROMPT
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# define CONFIG_SYS_PROMPT "bfin> "
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#endif
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#ifndef CONFIG_SYS_CBSIZE
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# define CONFIG_SYS_CBSIZE 1024
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#endif
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#ifndef CONFIG_SYS_BARGSIZE
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# define CONFIG_SYS_BARGSIZE CONFIG_SYS_CBSIZE
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#endif
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#ifndef CONFIG_SYS_PBSIZE
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# define CONFIG_SYS_PBSIZE (CONFIG_SYS_CBSIZE + sizeof(CONFIG_SYS_PROMPT) + 16)
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#endif
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#ifndef CONFIG_SYS_MAXARGS
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# define CONFIG_SYS_MAXARGS 16
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#endif
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#if defined(CONFIG_SYS_HZ)
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# if (CONFIG_SYS_HZ != 1000)
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# warning "CONFIG_SYS_HZ must always be 1000"
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# endif
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# undef CONFIG_SYS_HZ
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#endif
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#define CONFIG_SYS_HZ 1000
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#ifndef CONFIG_SYS_BAUDRATE_TABLE
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# define CONFIG_SYS_BAUDRATE_TABLE { 9600, 19200, 38400, 57600, 115200 }
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#endif
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#endif
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