/* * Memory map: * * CONFIG_RAMBASE : text segment * : rodata segment * : data segment * : bss segment * : stack * : heap */ /* * Bootstrap code for the STPC Consumer * Copyright (c) 1999 by Net Insight AB. All Rights Reserved. */ /* * Written by Johan Rydberg, based on work by Daniel Kahlin. * Rewritten by Eric Biederman * 2005.12 yhlu add coreboot_ram cross the vga font buffer handling */ /* We use ELF as output format. So that we can debug the code in some form. */ INCLUDE ldoptions ENTRY(_start) SECTIONS { . = CONFIG_RAMBASE; /* First we place the code and read only data (typically const declared). * This could theoretically be placed in rom. */ .text : { _text = .; *(.text); *(.text.*); . = ALIGN(16); _etext = .; } .rodata : { _rodata = .; . = ALIGN(4); console_drivers = .; *(.rodata.console_drivers) econsole_drivers = . ; . = ALIGN(4); pci_drivers = . ; *(.rodata.pci_driver) epci_drivers = . ; cpu_drivers = . ; *(.rodata.cpu_driver) ecpu_drivers = . ; *(.rodata) *(.rodata.*) /* kevinh/Ispiri - Added an align, because the objcopy tool * incorrectly converts sections that are not long word aligned. */ . = ALIGN(4); _erodata = .; } /* After the code we place initialized data (typically initialized * global variables). This gets copied into ram by startup code. * __data_start and __data_end shows where in ram this should be placed, * whereas __data_loadstart and __data_loadend shows where in rom to * copy from. */ .data : { _data = .; *(.data) _edata = .; } /* bss does not contain data, it is just a space that should be zero * initialized on startup. (typically uninitialized global variables) * crt0.S fills between _bss and _ebss with zeroes. */ _bss = .; .bss . : { *(.bss) *(.sbss) *(COMMON) } _ebss = .; _end = .; /* coreboot really "ends" here. Only heap and stack are placed after * this line. */ . = ALIGN(CONFIG_STACK_SIZE); _stack = .; .stack . : { /* Reserve a stack for each possible cpu */ . += CONFIG_MAX_CPUS*CONFIG_STACK_SIZE; } _estack = .; _heap = .; .heap . : { /* Reserve CONFIG_HEAP_SIZE bytes for the heap */ . = CONFIG_HEAP_SIZE ; . = ALIGN(4); } _eheap = .; /* The ram segment. This includes all memory used by the memory * resident copy of coreboot, except the tables that are produced on * the fly, but including stack and heap. */ _ram_seg = _text; _eram_seg = _eheap; /* CONFIG_RAMTOP is the upper address of cached memory (among other * things). We must not exceed beyond that address, there be dragons. */ _bogus = ASSERT( ( _eram_seg < (CONFIG_RAMTOP)) , "Please increase CONFIG_RAMTOP"); /* Discard the sections we don't need/want */ /DISCARD/ : { *(.comment) *(.note) *(.note.*) } }