This file handles common pre-relocation init for boards which use the generic framework.
It starts up the console, DRAM, performs relocation and then jumps to post-relocation init.
Signed-off-by: Simon Glass sjg@chromium.org --- Changes in v3: - Cast away the volatile on gd for memcpy()
common/Makefile | 3 + common/board_f.c | 490 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 493 insertions(+), 0 deletions(-) create mode 100644 common/board_f.c
diff --git a/common/Makefile b/common/Makefile index 2d9ae8c..3e9967b 100644 --- a/common/Makefile +++ b/common/Makefile @@ -36,6 +36,9 @@ COBJS-y += s_record.o COBJS-$(CONFIG_SERIAL_MULTI) += serial.o COBJS-y += xyzModem.o
+# boards +COBJS-$(CONFIG_SYS_GENERIC_BOARD) += board_f.o + # core command COBJS-y += cmd_boot.o COBJS-$(CONFIG_CMD_BOOTM) += cmd_bootm.o diff --git a/common/board_f.c b/common/board_f.c new file mode 100644 index 0000000..054eda5 --- /dev/null +++ b/common/board_f.c @@ -0,0 +1,490 @@ +/* + * Copyright (c) 2011 The Chromium OS Authors. + * (C) Copyright 2002-2006 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * (C) Copyright 2002 + * Sysgo Real-Time Solutions, GmbH <www.elinos.com> + * Marius Groeger mgroeger@sysgo.de + * + * 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 + */ + +#include <common.h> +#include <linux/compiler.h> +#include <version.h> +#include <asm-generic/sections.h> +#include <asm/io.h> +#include <environment.h> +#include <initcall.h> +#include <logbuff.h> +#include <post.h> + +/* + * Pointer to initial global data area + * + * Here we initialize it if needed. + */ +#ifdef XTRN_DECLARE_GLOBAL_DATA_PTR +#undef XTRN_DECLARE_GLOBAL_DATA_PTR +#define XTRN_DECLARE_GLOBAL_DATA_PTR /* empty = allocate here */ +DECLARE_GLOBAL_DATA_PTR = (gd_t *) (CONFIG_SYS_INIT_GD_ADDR); +#else +DECLARE_GLOBAL_DATA_PTR; +#endif + +/* TODO: Move to header file */ +int print_cpuinfo(void); + +/* + * sjg: IMO this code should be + * refactored to a single function, something like: + * + * void led_set_state(enum led_colour_t colour, int on); + */ +/************************************************************************ + * Coloured LED functionality + ************************************************************************ + * May be supplied by boards if desired + */ +inline void __coloured_LED_init(void) {} +void coloured_LED_init(void) + __attribute__((weak, alias("__coloured_LED_init"))); +inline void __red_led_on(void) {} +void red_led_on(void) __attribute__((weak, alias("__red_led_on"))); +inline void __red_led_off(void) {} +void red_led_off(void) __attribute__((weak, alias("__red_led_off"))); +inline void __green_led_on(void) {} +void green_led_on(void) __attribute__((weak, alias("__green_led_on"))); +inline void __green_led_off(void) {} +void green_led_off(void) __attribute__((weak, alias("__green_led_off"))); +inline void __yellow_led_on(void) {} +void yellow_led_on(void) __attribute__((weak, alias("__yellow_led_on"))); +inline void __yellow_led_off(void) {} +void yellow_led_off(void) __attribute__((weak, alias("__yellow_led_off"))); +inline void __blue_led_on(void) {} +void blue_led_on(void) __attribute__((weak, alias("__blue_led_on"))); +inline void __blue_led_off(void) {} +void blue_led_off(void) __attribute__((weak, alias("__blue_led_off"))); + +/* + * Why is gd allocated a register? Prior to reloc it might be better to + * just pass it around to each function in this file? + * + * After reloc one could argue that it is hardly used and doesn't need + * to be in a register. Or if it is it should perhaps hold pointers to all + * global data for all modules, so that post-reloc we can avoid the massive + * literal pool we get on ARM. Or perhaps just encourage each module to use + * a structure... + */ + +/* + * Could the CONFIG_SPL_BUILD infection become a flag in gd? + */ + +static int init_baud_rate(void) +{ + gd->baudrate = getenv_ulong("baudrate", 10, CONFIG_BAUDRATE); + return 0; +} + +static int display_text_info(void) +{ + ulong bss_start, bss_end; + + bss_start = _bss_start_ofs + _TEXT_BASE; + bss_end = _bss_end_ofs + _TEXT_BASE; + debug("U-Boot code: %08X -> %08lX BSS: -> %08lX\n", + CONFIG_SYS_TEXT_BASE, bss_start, bss_end); + +#ifdef CONFIG_MODEM_SUPPORT + debug("Modem Support enabled\n"); +#endif +#ifdef CONFIG_USE_IRQ + debug("IRQ Stack: %08lx\n", IRQ_STACK_START); + debug("FIQ Stack: %08lx\n", FIQ_STACK_START); +#endif + + return 0; +} + +static int announce_dram_init(void) +{ + puts("DRAM: "); + return 0; +} + +static int display_dram_config(void) +{ + ulong size; + +#ifdef CONFIG_NR_DRAM_BANKS + int i; + + debug("\nRAM Configuration:\n"); + for (i = size = 0; i < CONFIG_NR_DRAM_BANKS; i++) { + size += gd->bd->bi_dram[i].size; + debug("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start); +#ifdef DEBUG + print_size(gd->bd->bi_dram[i].size, "\n"); +#endif + } + debug("\nDRAM: "); +#else + size = gd->ram_size; +#endif + + print_size(size, "\n"); + + return 0; +} + +void __dram_init_banksize(void) +{ +#if defined(CONFIG_NR_DRAM_BANKS) && defined(CONFIG_SYS_SDRAM_BASE) + gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE; + gd->bd->bi_dram[0].size = get_effective_memsize(); +#endif +} + +void dram_init_banksize(void) + __attribute__((weak, alias("__dram_init_banksize"))); + +static int setup_global_data_ptr(void) +{ + /* Pointer is writable since we allocated a register for it */ + gd = (gd_t *) ((CONFIG_SYS_INIT_SP_ADDR) & ~0x07); + + /* compiler optimization barrier needed for GCC >= 3.4 */ + dmb(); + + return 0; +} + +static int zero_global_data(void) +{ + memset((void *)gd, '\0', sizeof(gd_t)); + + return 0; +} + +static int setup_mon_len(void) +{ + gd->mon_len = _bss_end_ofs; + return 0; +} + +static int setup_fdt(void) +{ +#ifdef CONFIG_OF_EMBED + /* Get a pointer to the FDT */ + gd->fdt_blob = _binary_dt_dtb_start; +#elif defined CONFIG_OF_SEPARATE + /* FDT is at end of image */ + gd->fdt_blob = (void *)(_end_ofs + CONFIG_SYS_TEXT_BASE); +#endif + /* Allow the early environment to override the fdt address */ + gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16, + (uintptr_t)gd->fdt_blob); + return 0; +} + +static int setup_reloc(void) +{ + debug("Monitor len: %08lX\n", gd->mon_len); + /* + * Ram is setup, size stored in gd !! + */ + debug("Ram size: %08lX\n", (ulong)gd->ram_size); +#if defined(CONFIG_SYS_MEM_TOP_HIDE) + /* + * Subtract specified amount of memory to hide so that it won't + * get "touched" at all by U-Boot. By fixing up gd->ram_size + * the Linux kernel should now get passed the now "corrected" + * memory size and won't touch it either. This should work + * for arch/ppc and arch/powerpc. Only Linux board ports in + * arch/powerpc with bootwrapper support, that recalculate the + * memory size from the SDRAM controller setup will have to + * get fixed. + */ + gd->ram_size -= CONFIG_SYS_MEM_TOP_HIDE; +#endif + gd->dest_addr = gd->bd->bi_dram[0].start + gd->bd->bi_dram[0].size; + gd->dest_addr_sp = gd->dest_addr; + return 0; +} + +#if defined(CONFIG_LOGBUFFER) && !defined(CONFIG_ALT_LB_ADDR) +static int reserve_logbuffer(void) +{ + /* reserve kernel log buffer */ + gd->dest_addr -= LOGBUFF_RESERVE; + debug("Reserving %dk for kernel logbuffer at %08lx\n", LOGBUFF_LEN, + gd->dest_addr); + return 0; +} +#endif + +#ifdef CONFIG_PRAM +/* reserve protected RAM */ +static int reserve_pram(void) +{ + ulong reg; + + reg = getenv_ulong("pram", 10, CONFIG_PRAM); + gd->dest_addr -= (reg << 10); /* size is in kB */ + debug("Reserving %ldk for protected RAM at %08lx\n", reg, + gd->dest_addr); + return 0; +} +#endif /* CONFIG_PRAM */ + +/* Round memory pointer down to next 4 kB limit */ +static int reserve_round_4k(void) +{ + gd->dest_addr &= ~(4096 - 1); + return 0; +} + +#if !(defined(CONFIG_SYS_ICACHE_OFF) && defined(CONFIG_SYS_DCACHE_OFF)) +static int reserve_mmu(void) +{ + /* reserve TLB table */ + gd->dest_addr -= (4096 * 4); + + /* round down to next 64 kB limit */ + gd->dest_addr &= ~(0x10000 - 1); + + gd->tlb_addr = gd->dest_addr; + debug("TLB table at: %08lx\n", gd->tlb_addr); + return 0; +} +#endif + +#ifdef CONFIG_LCD +static int reserve_lcd(void) +{ +#ifdef CONFIG_FB_ADDR + gd->fb_base = CONFIG_FB_ADDR; +#else + /* reserve memory for LCD display (always full pages) */ + gd->dest_addr = lcd_setmem(gd->dest_addr); + gd->fb_base = gd->dest_addr; +#endif /* CONFIG_FB_ADDR */ + return 0; +} +#endif /* CONFIG_LCD */ + +static int reserve_uboot(void) +{ + /* + * reserve memory for U-Boot code, data & bss + * round down to next 4 kB limit + */ + gd->dest_addr -= gd->mon_len; + gd->dest_addr &= ~(4096 - 1); + + debug("Reserving %ldk for U-Boot at: %08lx\n", gd->mon_len >> 10, + gd->dest_addr); + return 0; +} + +/* reserve memory for malloc() area */ +static int reserve_malloc(void) +{ + gd->dest_addr_sp = gd->dest_addr - TOTAL_MALLOC_LEN; + debug("Reserving %dk for malloc() at: %08lx\n", + TOTAL_MALLOC_LEN >> 10, gd->dest_addr_sp); + return 0; +} + +/* (permanently) allocate a Board Info struct */ +static int reserve_board(void) +{ + gd->dest_addr_sp -= sizeof(bd_t); + gd->bd = (bd_t *)gd->dest_addr_sp; + memset(gd->bd, '\0', sizeof(bd_t)); + debug("Reserving %zu Bytes for Board Info at: %08lx\n", + sizeof(bd_t), gd->dest_addr_sp); + return 0; +} + +static int setup_machine(void) +{ +#ifdef CONFIG_MACH_TYPE + gd->bd->bi_arch_number = CONFIG_MACH_TYPE; /* board id for Linux */ +#endif + return 0; +} + +static int reserve_global_data(void) +{ + gd->dest_addr_sp -= sizeof(gd_t); + gd->new_gd = (gd_t *)gd->dest_addr_sp; + debug("Reserving %zu Bytes for Global Data at: %08lx\n", + sizeof(gd_t), gd->dest_addr_sp); + return 0; +} + +static int reserve_stacks(void) +{ + /* setup stack pointer for exceptions */ + gd->irq_sp = gd->dest_addr_sp; +#ifdef CONFIG_USE_IRQ + gd->dest_addr_sp -= (CONFIG_STACKSIZE_IRQ + CONFIG_STACKSIZE_FIQ); + debug("Reserving %zu Bytes for IRQ stack at: %08lx\n", + CONFIG_STACKSIZE_IRQ + CONFIG_STACKSIZE_FIQ, gd->dest_addr_sp); + + /* 8-byte alignment for ARM ABI compliance */ + gd->dest_addr_sp &= ~0x07; +#endif + /* leave 3 words for abort-stack, plus 1 for alignment */ + gd->dest_addr_sp -= 16; + + return 0; +} + +static int display_new_sp(void) +{ + debug("New Stack Pointer is: %08lx\n", gd->dest_addr_sp); + + return 0; +} + +#ifdef CONFIG_POST +static int init_post(void) +{ + post_bootmode_init(); + post_run(NULL, POST_ROM | post_bootmode_get(0)); + + return 0; +} +#endif + +static int setup_baud_rate(void) +{ + /* Ick, can we get rid of this line? */ + gd->bd->bi_baudrate = gd->baudrate; + + return 0; +} + +static int setup_dram_config(void) +{ + /* Ram is board specific, so move it to board code ... */ + dram_init_banksize(); + + return 0; +} + +static int jump_to_copy(void) +{ + memcpy(gd->new_gd, (char *)gd, sizeof(gd_t)); + gd->relocaddr = gd->dest_addr; + gd->reloc_off = gd->dest_addr - CONFIG_SYS_TEXT_BASE; + debug("Relocation Offset is: %08lx\n", gd->reloc_off); + debug("Relocating to %08lx, new gd at %p, sp at %08lx\n", + gd->dest_addr, gd->new_gd, gd->dest_addr_sp); + + relocate_code(gd->dest_addr_sp, gd->new_gd, gd->dest_addr); + + return 0; +} + +static init_fnc_t init_sequence_f[] = { + setup_global_data_ptr, + setup_fdt, + setup_mon_len, +#if defined(CONFIG_ARCH_CPU_INIT) + arch_cpu_init, /* basic arch cpu dependent setup */ +#endif +#ifdef CONFIG_OF_CONTROL + fdtdec_check_fdt, +#endif +#if defined(CONFIG_BOARD_EARLY_INIT_F) + board_early_init_f, +#endif + timer_init, /* initialize timer */ +#ifdef CONFIG_FSL_ESDHC + get_clocks, +#endif + env_init, /* initialize environment */ + init_baud_rate, /* initialze baudrate settings */ + serial_init, /* serial communications setup */ + console_init_f, /* stage 1 init of console */ + display_options, /* say that we are here */ + display_text_info, /* show debugging info if required */ +#if defined(CONFIG_DISPLAY_CPUINFO) + print_cpuinfo, /* display cpu info (and speed) */ +#endif +#if defined(CONFIG_DISPLAY_BOARDINFO) + checkboard, /* display board info */ +#endif + announce_dram_init, + dram_init, /* configure available RAM banks */ + setup_dram_config, + display_dram_config, +#ifdef CONFIG_POST + init_post, +#endif + setup_reloc, +#if defined(CONFIG_LOGBUFFER) && !defined(CONFIG_ALT_LB_ADDR) + reserve_logbuffer, +#endif +#ifdef CONFIG_PRAM + reserve_pram, +#endif + reserve_round_4k, +#if !(defined(CONFIG_SYS_ICACHE_OFF) && defined(CONFIG_SYS_DCACHE_OFF)) + reserve_mmu, +#endif +#ifdef CONFIG_LCD + reserve_lcd, +#endif + reserve_uboot, + reserve_malloc, + reserve_board, + setup_machine, + reserve_global_data, + reserve_stacks, + setup_baud_rate, + display_new_sp, + jump_to_copy, + NULL, +}; + +void board_init_f(ulong bootflags) +{ + /* TODO: perhaps declare gd as a local variable */ + + /* TODO: save bootflag into gd->flags */ + if (initcall_run_list(init_sequence_f)) + hang(); + + /* NOTREACHED - jump_to_copy() does not return */ + while (1) + ; +} + +void hang(void) +{ + puts("### ERROR ### Please RESET the board ###\n"); + for (;;) + ; +}