From 0da38dde4b173e43e29435751549809b4b13053d Mon Sep 17 00:00:00 2001 From: Patrick Georgi Date: Mon, 9 Nov 2009 17:18:02 +0000 Subject: Add a "locate" function cbfstool, which helps you find out a suitable address to put a XIP stage to. Specifically, you pass it the file (to get its filesize), its filename (as the header has a variable length that depends on it), and the granularity requirement it has to fit in (for XIP). The granularity is MTRR-style: when you request 0x10000, cbfstool looks for a suitable place in a 64kb-aligned 64kb block. cbfstool simply prints out a hex value which is the start address of a suitably located free memory block. That value can then be used with cbfs add-stage to store the file in the ROM image. It's a two-step operation (instead of being merged into cbfs add-stage) because the image must be linked twice: First, with some bogus, but safe base address (eg. 0) to figure out the target address (based on file size). Then a second time at the target address. The work flow is: - link file - cbfstool locate - link file again - cbfstool add-stage. Signed-off-by: Patrick Georgi Acked-by: Stefan Reinauer git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4929 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1 --- util/cbfstool/common.c | 65 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 65 insertions(+) (limited to 'util/cbfstool/common.c') diff --git a/util/cbfstool/common.c b/util/cbfstool/common.c index 4c453995ed..1f69fa37f5 100644 --- a/util/cbfstool/common.c +++ b/util/cbfstool/common.c @@ -27,6 +27,16 @@ #define dprintf +uint32_t getfilesize(const char *filename) +{ + uint32_t size; + FILE *file = fopen(filename, "rb"); + fseek(file, 0, SEEK_END); + size = ftell(file); + fclose(file); + return size; +} + void *loadfile(const char *filename, uint32_t * romsize_p, void *content, int place) { @@ -323,3 +333,58 @@ int create_cbfs_image(const char *romfile, uint32_t _romsize, writerom(romfile, romarea, romsize); return 0; } + +static int in_segment(int addr, int size, int gran) +{ + return ((addr & ~(gran - 1)) == ((addr + size) & ~(gran - 1))); +} + +uint32_t cbfs_find_location(const char *romfile, uint32_t filesize, + const char *filename, uint32_t alignment) +{ + void *rom = loadrom(romfile); + int filename_size = strlen(filename); + + int headersize = + sizeof(struct cbfs_file) + ALIGN(filename_size + 1, + 16) + sizeof(struct cbfs_stage); + int totalsize = headersize + filesize; + + uint32_t current = phys_start; + while (current < phys_end) { + if (!cbfs_file_header(current)) { + current += align; + continue; + } + struct cbfs_file *thisfile = + (struct cbfs_file *)phys_to_virt(current); + + uint32_t top = + current + ntohl(thisfile->len) + ntohl(thisfile->offset); + if (((ntohl(thisfile->type) == 0x0) + || (ntohl(thisfile->type) == 0xffffffff)) + && (ntohl(thisfile->len) + ntohl(thisfile->offset) >= + totalsize)) { + if (in_segment + (current + headersize, filesize, alignment)) + return current + headersize; + if ((ALIGN(current, alignment) + filesize < top) + && (ALIGN(current, alignment) - headersize > + current) + && in_segment(ALIGN(current, alignment), filesize, + alignment)) + return ALIGN(current, alignment); + if ((ALIGN(current, alignment) + alignment + filesize < + top) + && (ALIGN(current, alignment) + alignment - + headersize > current) + && in_segment(ALIGN(current, alignment) + alignment, + filesize, alignment)) + return ALIGN(current, alignment) + alignment; + } + current = + ALIGN(current + ntohl(thisfile->len) + + ntohl(thisfile->offset), align); + } + return 0; +} -- cgit v1.2.3