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authorHung-Te Lin <hungte@chromium.org>2013-01-22 18:57:56 +0800
committerRonald G. Minnich <rminnich@gmail.com>2013-01-30 17:58:32 +0100
commit6fe0cab205e131525efbfce4f59da344b1e76598 (patch)
tree0ecd9e5059fd9bb2669f7487f39890beee14fcc3 /src/lib/cbfs.c
parent5fc64dca45b01556a9325bea0fb563d6f0d16f75 (diff)
downloadcoreboot-6fe0cab205e131525efbfce4f59da344b1e76598.tar.xz
Extend CBFS to support arbitrary ROM source media.
Summary: Isolate CBFS underlying I/O to board/arch-specific implementations as "media stream", to allow loading and booting romstage on non-x86. CBFS functions now all take a new "media source" parameter; use CBFS_DEFAULT_MEDIA if you simply want to load from main firmware. API Changes: cbfs_find => cbfs_get_file. cbfs_find_file => cbfs_get_file_content. cbfs_get_file => cbfs_get_file_content with correct type. CBFS used to work only on memory-mapped ROM (all x86). For platforms like ARM, the ROM may come from USB, UART, or SPI -- any serial devices and not available for memory mapping. To support these devices (and allowing CBFS to read from multiple source at the same time), CBFS operations are now virtual-ized into "cbfs_media". To simplify porting existing code, every media source must support both "reading into pre-allocated memory (read)" and "read and return an allocated buffer (map)". For devices without native memory-mapped ROM, "cbfs_simple_buffer*" provides simple memory mapping simulation. Every CBFS function now takes a cbfs_media* as parameter. CBFS_DEFAULT_MEDIA is defined for CBFS functions to automatically initialize a per-board default media (CBFS will internally calls init_default_cbfs_media). Also revised CBFS function names relying on memory mapped backend (ex, "cbfs_find" => actually loads files). Now we only have two getters: struct cbfs_file *entry = cbfs_get_file(media, name); void *data = cbfs_get_file_content(CBFS_DEFAULT_MEDIA, name, type); Test results: - Verified to work on x86/qemu. - Compiles on ARM, and follow up commit will provide working SPI driver. Change-Id: Iac911ded25a6f2feffbf3101a81364625bb07746 Signed-off-by: Hung-Te Lin <hungte@chromium.org> Reviewed-on: http://review.coreboot.org/2182 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Diffstat (limited to 'src/lib/cbfs.c')
-rw-r--r--src/lib/cbfs.c141
1 files changed, 102 insertions, 39 deletions
diff --git a/src/lib/cbfs.c b/src/lib/cbfs.c
index 98672d4ae6..3e44582f4d 100644
--- a/src/lib/cbfs.c
+++ b/src/lib/cbfs.c
@@ -2,6 +2,7 @@
* This file is part of the coreboot project.
*
* Copyright (C) 2008, Jordan Crouse <jordan@cosmicpenguin.net>
+ * Copyright (C) 2013 The Chromium OS Authors. All rights reserved.
*
* 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
@@ -17,57 +18,74 @@
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
*/
-#include <types.h>
-#include <string.h>
-#include <console/console.h>
+#ifdef LIBPAYLOAD
+# include <libpayload-config.h>
+# ifdef CONFIG_LZMA
+# include <lzma.h>
+# define CBFS_CORE_WITH_LZMA
+# endif
+# define CBFS_MINI_BUILD
+#elif defined(__SMM__)
+# define CBFS_MINI_BUILD
+#else
+# define CBFS_CORE_WITH_LZMA
+# include <lib.h>
+#endif
+
#include <cbfs.h>
-#include <lib.h>
-#include <arch/byteorder.h>
+#include <string.h>
-// use CBFS core
-#ifndef __SMM__
-#define CBFS_CORE_WITH_LZMA
+#ifdef LIBPAYLOAD
+# include <stdio.h>
+# define DEBUG(x...)
+# define LOG(x...) printf(x)
+# define ERROR(x...) printf(x)
+#else
+# include <console/console.h>
+# define ERROR(x...) printk(BIOS_ERR, "CBFS: " x)
+# define LOG(x...) printk(BIOS_INFO, "CBFS: " x)
+# if CONFIG_DEBUG_CBFS
+# define DEBUG(x...) printk(BIOS_SPEW, "CBFS: " x)
+# else
+# define DEBUG(x...)
+# endif
#endif
-#define phys_to_virt(x) (void*)(x)
-#define virt_to_phys(x) (uint32_t)(x)
-#define ERROR(x...) printk(BIOS_ERR, "CBFS: " x)
-#define LOG(x...) printk(BIOS_INFO, "CBFS: " x)
-#if CONFIG_DEBUG_CBFS
-#define DEBUG(x...) printk(BIOS_SPEW, "CBFS: " x)
+
+#if defined(CONFIG_CBFS_HEADER_ROM_OFFSET) && (CONFIG_CBFS_HEADER_ROM_OFFSET)
+# define CBFS_HEADER_ROM_ADDRESS (CONFIG_CBFS_HEADER_ROM_OFFSET)
#else
-#define DEBUG(x...)
+// Indirect address: only works on 32bit top-aligned systems.
+# define CBFS_HEADER_ROM_ADDRESS (*(uint32_t *)0xfffffffc)
#endif
-// FIXME: romstart/romend are fine on x86, but not on ARM
-#define romstart() 0xffffffff
-#define romend() 0
#include "cbfs_core.c"
#ifndef __SMM__
static inline int tohex4(unsigned int c)
{
- return (c<=9)?(c+'0'):(c-10+'a');
+ return (c <= 9) ? (c + '0') : (c - 10 + 'a');
}
static void tohex16(unsigned int val, char* dest)
{
- dest[0]=tohex4(val>>12);
- dest[1]=tohex4((val>>8) & 0xf);
- dest[2]=tohex4((val>>4) & 0xf);
- dest[3]=tohex4(val & 0xf);
+ dest[0] = tohex4(val>>12);
+ dest[1] = tohex4((val>>8) & 0xf);
+ dest[2] = tohex4((val>>4) & 0xf);
+ dest[3] = tohex4(val & 0xf);
}
-void *cbfs_load_optionrom(u16 vendor, u16 device, void * dest)
+void *cbfs_load_optionrom(struct cbfs_media *media, uint16_t vendor,
+ uint16_t device, void *dest)
{
- char name[17]="pciXXXX,XXXX.rom";
+ char name[17] = "pciXXXX,XXXX.rom";
struct cbfs_optionrom *orom;
- u8 *src;
+ uint8_t *src;
tohex16(vendor, name+3);
tohex16(device, name+8);
orom = (struct cbfs_optionrom *)
- cbfs_find_file(name, CBFS_TYPE_OPTIONROM);
+ cbfs_get_file_content(media, name, CBFS_TYPE_OPTIONROM);
if (orom == NULL)
return NULL;
@@ -77,10 +95,10 @@ void *cbfs_load_optionrom(u16 vendor, u16 device, void * dest)
* in the common case, the expansion rom is uncompressed, we
* pass 0 in for the dest, and all we have to do is find the rom and
* return a pointer to it.
- */
+ */
/* BUG: the cbfstool is (not yet) including a cbfs_optionrom header */
- src = ((unsigned char *) orom); // + sizeof(struct cbfs_optionrom);
+ src = (uint8_t *)orom; // + sizeof(struct cbfs_optionrom);
if (! dest)
return src;
@@ -94,27 +112,27 @@ void *cbfs_load_optionrom(u16 vendor, u16 device, void * dest)
return dest;
}
-void * cbfs_load_stage(const char *name)
+void * cbfs_load_stage(struct cbfs_media *media, const char *name)
{
struct cbfs_stage *stage = (struct cbfs_stage *)
- cbfs_find_file(name, CBFS_TYPE_STAGE);
+ cbfs_get_file_content(media, name, CBFS_TYPE_STAGE);
/* this is a mess. There is no ntohll. */
/* for now, assume compatible byte order until we solve this. */
- u32 entry;
+ uint32_t entry;
if (stage == NULL)
return (void *) -1;
LOG("loading stage %s @ 0x%x (%d bytes), entry @ 0x%llx\n",
name,
- (u32) stage->load, stage->memlen,
+ (uint32_t) stage->load, stage->memlen,
stage->entry);
- memset((void *) (u32) stage->load, 0, stage->memlen);
+ memset((void *) (uint32_t) stage->load, 0, stage->memlen);
if (cbfs_decompress(stage->compression,
((unsigned char *) stage) +
sizeof(struct cbfs_stage),
- (void *) (u32) stage->load,
+ (void *) (uint32_t) stage->load,
stage->len))
return (void *) -1;
@@ -126,10 +144,10 @@ void * cbfs_load_stage(const char *name)
return (void *) entry;
}
-int cbfs_execute_stage(const char *name)
+int cbfs_execute_stage(struct cbfs_media *media, const char *name)
{
struct cbfs_stage *stage = (struct cbfs_stage *)
- cbfs_find_file(name, CBFS_TYPE_STAGE);
+ cbfs_get_file_content(media, name, CBFS_TYPE_STAGE);
if (stage == NULL)
return 1;
@@ -141,8 +159,52 @@ int cbfs_execute_stage(const char *name)
}
/* FIXME: This isn't right */
- LOG("run @ %p\n", (void *) ntohl((u32) stage->entry));
- return run_address((void *) (intptr_t)ntohll(stage->entry));
+ LOG("run @ %p\n", (void *) ntohl((uint32_t) stage->entry));
+ return run_address((void *)(uintptr_t)ntohll(stage->entry));
+}
+
+void *cbfs_load_payload(struct cbfs_media *media, const char *name)
+{
+ return (struct cbfs_payload *)cbfs_get_file_content(
+ media, name, CBFS_TYPE_PAYLOAD);
+}
+
+/* Simple buffer */
+
+void *cbfs_simple_buffer_map(struct cbfs_simple_buffer *buffer,
+ struct cbfs_media *media,
+ size_t offset, size_t count) {
+ void *address = buffer->buffer + buffer->allocated;;
+ DEBUG("simple_buffer_map(offset=%d, count=%d): "
+ "allocated=%d, size=%d, last_allocate=%d\n",
+ offset, count, buffer->allocated, buffer->size,
+ buffer->last_allocate);
+ if (buffer->allocated + count >= buffer->size)
+ return CBFS_MEDIA_INVALID_MAP_ADDRESS;
+ if (media->read(media, address, offset, count) != count) {
+ ERROR("simple_buffer: fail to read %zd bytes from 0x%zx\n",
+ count, offset);
+ return CBFS_MEDIA_INVALID_MAP_ADDRESS;
+ }
+ buffer->allocated += count;
+ buffer->last_allocate = count;
+ return address;
+}
+
+void *cbfs_simple_buffer_unmap(struct cbfs_simple_buffer *buffer,
+ const void *address) {
+ // TODO Add simple buffer management so we can free more than last
+ // allocated one.
+ DEBUG("simple_buffer_unmap(address=0x%p): "
+ "allocated=%d, size=%d, last_allocate=%d\n",
+ address, buffer->allocated, buffer->size,
+ buffer->last_allocate);
+ if ((buffer->buffer + buffer->allocated - buffer->last_allocate) ==
+ address) {
+ buffer->allocated -= buffer->last_allocate;
+ buffer->last_allocate = 0;
+ }
+ return NULL;
}
/**
@@ -158,4 +220,5 @@ int run_address(void *f)
v = f;
return v();
}
+
#endif