u-boot.git/arch/x86/lib, branch v2013.04

x86: Move PCI init before SPI init

2013-03-19T15:45:37Z

It is possible that our PCI bus will provide the SPI controller, so change the init order to make this work. Signed-off-by: Simon Glass

x86: Enable generic board support

2013-03-15T20:14:00Z

This enables generic board support so that x86 boards can define CONFIG_SYS_GENERIC_BOARD. Signed-off-by: Simon Glass

x86: Use sections header to obtain link symbols

2013-03-15T20:14:00Z

These are defined in asm-generic/sections.h, so remove them from architecture-specific files. Signed-off-by: Simon Glass

Introduce generic pre-relocation board_f.c

2013-03-15T20:13:59Z

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 Tested-by: Wolfgang Denk Acked-by: Wolfgang Denk

x86: Add error checking to x86 relocation code

2013-03-04T23:57:48Z

This does not actually change normal behaviour, but adds a check that should detect corruption of relocation data (e.g. by using BSS data prior to relocation). Also add additional debugging output when enabled. During this investigation, two situations have been seen: 1. calculate_relocation_address(): uintptr_t size = (uintptr_t)&__bss_end - (uintptr_t)&__text_start; turns into 111166f: b8 83 c4 17 01 mov $0x117c483,%eax whih is beyond the end of bss: 0117b484 g .bss 00000000 __bss_end Somehow the __bss_end here is 255 bytes ahead. 2. do_elf_reloc_fixups(): uintptr_t size = (uintptr_t)&__bss_end - (uintptr_t)&__text_start; Here the __text_start is 0 in the file: 1111d9f: bb a0 e0 13 01 mov $0x113e0a0,%ebx 1111da4: 81 ef 00 00 00 00 sub $0x0,%edi As it happens, both of these are in pre-relocation code. For these reasons we silent check and ignore bad relocations. Signed-off-by: Simon Glass

x86: Support relocation of FDT on start-up

2013-03-04T23:57:47Z

With CONFIG_OF_CONTROL we may have an FDT in the BSS region. Relocate it up with the rest of U-Boot to keep the rest of memory free. Signed-off-by: Simon Glass

x86: Add an __end symbol to signal the end of the U-Boot binary

2013-03-04T23:57:38Z

With this symbol we can easy append something (e.g. an FDT) to the U-Boot binary and access it from within U-Boot. Signed-off-by: Simon Glass

x86: Permit bootstage and timer data to be used prior to relocation

2013-03-04T23:57:36Z

It is useful to be able to access the timer before U-Boot has relocated so that we can fully support bootstage. Add new global_data members to support this. Signed-off-by: Simon Glass

x86: Add function to get top of usable ram

2013-03-04T23:56:46Z

The memory layout calculations are done in calculate_relocation_address(), and coreboot has its own version of this function. But in fact all we really need is to set the top of usable RAM, and then the base version will work as is. So instead of allowing the whole calculate_relocation_address() function to be replaced, create board_get_usable_ram_top() which can be used by a board to specify the top of the area where U-Boot relocations to. Signed-off-by: Simon Glass

x86: Remove unused real mode code

2013-02-15T04:19:03Z

This code is pretty old and we want to support only 32-bit systems now. Signed-off-by: Simon Glass Acked-by: Graeme Russ