From d47ab0ecde1c9a66acbaf421ddd92c888d2ef344 Mon Sep 17 00:00:00 2001 From: Graeme Russ Date: Fri, 23 Dec 2011 16:51:29 +1100 Subject: x86: Split init functions out of board.c This patch moves towards reducing board.c to simply a set of init cores for the three initialisation phases (Flash, Flash/RAM, and RAM), a set of three init function arrays and a init function array processing function --- arch/x86/lib/init_helpers.c | 142 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 142 insertions(+) create mode 100644 arch/x86/lib/init_helpers.c (limited to 'arch/x86/lib/init_helpers.c') diff --git a/arch/x86/lib/init_helpers.c b/arch/x86/lib/init_helpers.c new file mode 100644 index 0000000..547b180 --- /dev/null +++ b/arch/x86/lib/init_helpers.c @@ -0,0 +1,142 @@ +/* + * (C) Copyright 2011 + * Graeme Russ, + * + * 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +DECLARE_GLOBAL_DATA_PTR; + +/************************************************************************ + * Init Utilities * + ************************************************************************ + * Some of this code should be moved into the core functions, + * or dropped completely, + * but let's get it working (again) first... + */ + +int display_banner(void) +{ + printf("\n\n%s\n\n", version_string); + + return 0; +} + +int display_dram_config(void) +{ + int i; + + puts("DRAM Configuration:\n"); + + for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) { + printf("Bank #%d: %08lx ", i, gd->bd->bi_dram[i].start); + print_size(gd->bd->bi_dram[i].size, "\n"); + } + + return 0; +} + +int init_baudrate_f(void) +{ + gd->baudrate = getenv_ulong("baudrate", 10, CONFIG_BAUDRATE); + return 0; +} + +int mem_malloc_init_r(void) +{ + mem_malloc_init(((gd->relocaddr - CONFIG_SYS_MALLOC_LEN)+3)&~3, + CONFIG_SYS_MALLOC_LEN); + + return 0; +} + +bd_t bd_data; + +int init_bd_struct_r(void) +{ + gd->bd = &bd_data; + memset(gd->bd, 0, sizeof(bd_t)); + + return 0; +} + +#ifndef CONFIG_SYS_NO_FLASH +int flash_init_r(void) +{ + ulong size; + + puts("Flash: "); + + /* configure available FLASH banks */ + size = flash_init(); + + print_size(size, "\n"); + + return 0; +} +#endif + +int init_ip_address_r(void) +{ + /* IP Address */ + bd_data.bi_ip_addr = getenv_IPaddr("ipaddr"); + + return 0; +} + +#ifdef CONFIG_STATUS_LED +int status_led_set_r(void) +{ + status_led_set(STATUS_LED_BOOT, STATUS_LED_BLINKING); + + return 0; +} +#endif + +int set_bootfile_r(void) +{ + char *s; + + s = getenv("bootfile"); + + if (s != NULL) + copy_filename(BootFile, s, sizeof(BootFile)); + + return 0; +} + +int set_load_addr_r(void) +{ + /* Initialize from environment */ + load_addr = getenv_ulong("loadaddr", 16, load_addr); + + return 0; +} -- cgit v1.1 From a1d57b7aba85abc787675952b40c550bf3a595f8 Mon Sep 17 00:00:00 2001 From: Graeme Russ Date: Fri, 23 Dec 2011 21:14:22 +1100 Subject: x86: Convert board_init_f_r to a processing loop Create an init function array for board_init_f_r - This finalises the migration to a purely array based initialisation mechanism Also tweak a few comments while we are at it so everything is 'correct' -- Changes for v2: - Renamed to a more apt name - Fix bug in set_reloc_flag_r - Re-instate gd->flags = boot_flags; in board_init_f - Added commit message --- arch/x86/lib/init_helpers.c | 75 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 75 insertions(+) (limited to 'arch/x86/lib/init_helpers.c') diff --git a/arch/x86/lib/init_helpers.c b/arch/x86/lib/init_helpers.c index 547b180..9f4dee0 100644 --- a/arch/x86/lib/init_helpers.c +++ b/arch/x86/lib/init_helpers.c @@ -29,6 +29,7 @@ #include #include #include +#include #include #include @@ -70,6 +71,80 @@ int init_baudrate_f(void) return 0; } +int calculate_relocation_address(void) +{ + ulong text_start = (ulong)&__text_start; + ulong bss_end = (ulong)&__bss_end; + ulong dest_addr; + + /* + * NOTE: All destination address are rounded down to 16-byte + * boundary to satisfy various worst-case alignment + * requirements + */ + + /* Global Data is at top of available memory */ + dest_addr = gd->ram_size; + dest_addr -= GENERATED_GBL_DATA_SIZE; + dest_addr &= ~15; + gd->new_gd_addr = dest_addr; + + /* GDT is below Global Data */ + dest_addr -= X86_GDT_SIZE; + dest_addr &= ~15; + gd->gdt_addr = dest_addr; + + /* Stack is below GDT */ + gd->start_addr_sp = dest_addr; + + /* U-Boot is below the stack */ + dest_addr -= CONFIG_SYS_STACK_SIZE; + dest_addr -= (bss_end - text_start); + dest_addr &= ~15; + gd->relocaddr = dest_addr; + gd->reloc_off = (dest_addr - text_start); + + return 0; +} + +int copy_gd_to_ram_f_r(void) +{ + gd_t *ram_gd; + + /* + * Global data is still in temporary memory (the CPU cache). + * calculate_relocation_address() has set gd->new_gd_addr to + * where the global data lives in RAM but getting it there + * safely is a bit tricky due to the 'F-Segment Hack' that + * we need to use for x86 + */ + ram_gd = (gd_t *)gd->new_gd_addr; + memcpy((void *)ram_gd, gd, sizeof(gd_t)); + + /* + * Reload the Global Descriptor Table so FS points to the + * in-RAM copy of Global Data (calculate_relocation_address() + * has already calculated the in-RAM location of the GDT) + */ + ram_gd->gd_addr = (ulong)ram_gd; + init_gd(ram_gd, (u64 *)gd->gdt_addr); + + return 0; +} + +int init_cache_f_r(void) +{ + /* Initialise the CPU cache(s) */ + return init_cache(); +} + +int set_reloc_flag_r(void) +{ + gd->flags = GD_FLG_RELOC; + + return 0; +} + int mem_malloc_init_r(void) { mem_malloc_init(((gd->relocaddr - CONFIG_SYS_MALLOC_LEN)+3)&~3, -- cgit v1.1