Add a structure for table-driven configuration mechanism such that no recompilation is needed to update the configuration parameters, rather than hard-coding board initialization parameters.
Signed-off-by: Che-Liang Chiou clchiou@chromium.org Signed-off-by: Abhilash Kesavan a.kesavan@samsung.com Signed-off-by: Tom Wai-Hong Tam waihong@chromium.org Signed-off-by: Simon Glass sjg@chromium.org Signed-off-by: Rajeshwari Shinde rajeshwari.s@samsung.com --- Changes in V2: - Included Paramateric structure with in #ifndef __ASSEMBLY__. Changes in V3: - None arch/arm/include/asm/arch-exynos/spl.h | 97 ++++++++++++++++++++++++++++++++ 1 files changed, 97 insertions(+), 0 deletions(-) create mode 100644 arch/arm/include/asm/arch-exynos/spl.h
diff --git a/arch/arm/include/asm/arch-exynos/spl.h b/arch/arm/include/asm/arch-exynos/spl.h new file mode 100644 index 0000000..306b41d --- /dev/null +++ b/arch/arm/include/asm/arch-exynos/spl.h @@ -0,0 +1,97 @@ +/* + * Copyright (c) 2012 The Chromium OS Authors. + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#ifndef __ASM_ARCH_EXYNOS_SPL_H__ +#define __ASM_ARCH_EXYNOS_SPL_H__ + +#include <asm/arch-exynos/dmc.h> + +enum boot_mode { + /* + * Assign the OM pin values for respective boot modes. + * Exynos4 does not support spi boot and the mmc boot OM + * pin values are the same across Exynos4 and Exynos5. + */ + BOOT_MODE_MMC = 4, + BOOT_MODE_SERIAL = 20, + /* Boot based on Operating Mode pin settings */ + BOOT_MODE_OM = 32, + BOOT_MODE_USB, /* Boot using USB download */ +}; + +#ifndef __ASSEMBLY__ +/* Parameters of early board initialization in SPL */ +struct spl_machine_param { + /* Add fields as and when required */ + u32 signature; + u32 version; /* Version number */ + u32 size; /* Size of block */ + /** + * Parameters we expect, in order, terminated with \0. Each parameter + * is a single character representing one 32-bit word in this + * structure. + * + * Valid characters in this string are: + * + * Code Name + * v mem_iv_size + * m mem_type + * u uboot_size + * b boot_source + * f frequency_mhz (memory frequency in MHz) + * a ARM clock frequency in MHz + * s serial base address + * i i2c base address for early access (meant for PMIC) + * r board rev GPIO numbers used to read board revision + * (lower halfword=bit 0, upper=bit 1) + * M Memory Manufacturer name + * \0 termination + */ + char params[12]; /* Length must be word-aligned */ + u32 mem_iv_size; /* Memory channel interleaving size */ + enum ddr_mode mem_type; /* Type of on-board memory */ + /* + * U-boot size - The iROM mmc copy function used by the SPL takes a + * block count paramter to describe the u-boot size unlike the spi + * boot copy function which just uses the u-boot size directly. Align + * the u-boot size to block size (512 bytes) when populating the SPL + * table only for mmc boot. + */ + u32 uboot_size; + enum boot_mode boot_source; /* Boot device */ + enum mem_manuf mem_manuf; /* Memory Manufacturer */ + unsigned frequency_mhz; /* Frequency of memory in MHz */ + unsigned arm_freq_mhz; /* ARM Frequency in MHz */ + u32 serial_base; /* Serial base address */ + u32 i2c_base; /* i2c base address */ +} __attribute__((__packed__)); +#endif + +/** + * Validate signature and return a pointer to the parameter table. If the + * signature is invalid, call panic() and never return. + * + * @return pointer to the parameter table if signature matched or never return. + */ +struct spl_machine_param *spl_get_machine_params(void); + +#endif /* __ASM_ARCH_EXYNOS_SPL_H__ */