Aaron Durbin (adurbin@google.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/4897
-gerrit
commit d942d1fc979c3920d083134e9cdf8996128958a0 Author: Aaron Durbin adurbin@chromium.org Date: Thu Oct 24 10:14:06 2013 -0500
rmodule: consolidate rmodule stage loading
There are 3 places rmodule stages are loaded in the existing code: cbfs and 2 in vboot_wrapper. Much of the code is the same except for a few different cbmem entry ids. Instead provide a common implementation in the rmodule library itself.
A structure named rmod_stage_load is introduced to manage the inputs and outputs from the new API.
BUG=chrome-os-partner:22866 BRANCH=None TEST=Built and booted successfully.
Change-Id: I146055005557e04164e95de4aae8a2bde8713131 Signed-off-by: Aaron Durbin adurbin@chromium.org Reviewed-on: https://chromium-review.googlesource.com/174425 Reviewed-by: Duncan Laurie dlaurie@chromium.org --- src/include/rmodule.h | 20 ++++++ src/lib/cbfs.c | 50 +++----------- src/lib/rmodule.c | 61 +++++++++++++++++ src/vendorcode/google/chromeos/vboot_loader.c | 95 +++++---------------------- 4 files changed, 108 insertions(+), 118 deletions(-)
diff --git a/src/include/rmodule.h b/src/include/rmodule.h index 247711a..da12ec8 100644 --- a/src/include/rmodule.h +++ b/src/include/rmodule.h @@ -79,6 +79,26 @@ int rmodule_calc_region(unsigned int region_alignment, size_t rmodule_size, __attribute__ ((section (".module_header"))) = \ RMODULE_HEADER(entry_, type_)
+/* Support for loading rmodule stages. This API is only available wwhen + * using dynamic cbmem because it uses the dynamic cbmem API to obtain + * the backing store region for the stage. */ +#if CONFIG_DYNAMIC_CBMEM +struct cbfs_stage; +struct cbmem_entry; + +struct rmod_stage_load { + /* Inputs */ + uint32_t cbmem_id; + const char *name; + /* Outputs */ + const struct cbmem_entry *cbmem_entry; + void *entry; +}; + +/* Both of the following functions return 0 on success, -1 on error. */ +int rmodule_stage_load(struct rmod_stage_load *rsl, struct cbfs_stage *stage); +int rmodule_stage_load_from_cbfs(struct rmod_stage_load *rsl); +#endif
/* Private data structures below should not be used directly. */
diff --git a/src/lib/cbfs.c b/src/lib/cbfs.c index 396fe33..9fe1757 100644 --- a/src/lib/cbfs.c +++ b/src/lib/cbfs.c @@ -130,51 +130,19 @@ void *cbfs_load_optionrom(struct cbfs_media *media, uint16_t vendor, static void *load_stage_from_cbfs(struct cbfs_media *media, const char *name, struct romstage_handoff *handoff) { - struct cbfs_stage *stage; - struct rmodule ramstage; - void *entry_point; - size_t region_size; - char *ramstage_region; - int rmodule_offset; - int load_offset; - const struct cbmem_entry *ramstage_entry; - - stage = (struct cbfs_stage *) - cbfs_get_file_content(media, name, CBFS_TYPE_STAGE, NULL); + struct rmod_stage_load rmod_ram = { + .cbmem_id = CBMEM_ID_RAMSTAGE, + .name = name, + };
- if (stage == NULL) - return (void *) -1; - - rmodule_offset = - rmodule_calc_region(DYN_CBMEM_ALIGN_SIZE, - stage->memlen, ®ion_size, &load_offset); - - ramstage_entry = cbmem_entry_add(CBMEM_ID_RAMSTAGE, region_size); - - if (ramstage_entry == NULL) + if (rmodule_stage_load_from_cbfs(&rmod_ram)) { + printk(BIOS_DEBUG, "Could not load ramstage.\n"); return (void *) -1; + }
- ramstage_region = cbmem_entry_start(ramstage_entry); - - LOG("Decompressing stage %s @ 0x%p (%d bytes)\n", - name, &ramstage_region[rmodule_offset], stage->memlen); - - if (!cbfs_decompress(stage->compression, &stage[1], - &ramstage_region[rmodule_offset], stage->len)) - return (void *) -1; - - if (rmodule_parse(&ramstage_region[rmodule_offset], &ramstage)) - return (void *) -1; - - /* The ramstage is responsible for clearing its own bss. */ - if (rmodule_load(&ramstage_region[load_offset], &ramstage)) - return (void *) -1; - - entry_point = rmodule_entry(&ramstage); - - cache_loaded_ramstage(handoff, ramstage_entry, entry_point); + cache_loaded_ramstage(handoff, rmod_ram.cbmem_entry, rmod_ram.entry);
- return entry_point; + return rmod_ram.entry; }
void * cbfs_load_stage(struct cbfs_media *media, const char *name) diff --git a/src/lib/rmodule.c b/src/lib/rmodule.c index 462c7d7..a78afea 100644 --- a/src/lib/rmodule.c +++ b/src/lib/rmodule.c @@ -300,3 +300,64 @@ int rmodule_calc_region(unsigned int region_alignment, size_t rmodule_size,
return region_alignment - sizeof(struct rmodule_header); } + +#if CONFIG_DYNAMIC_CBMEM +#include <cbmem.h> +#include <cbfs_core.h> + +int rmodule_stage_load(struct rmod_stage_load *rsl, struct cbfs_stage *stage) +{ + struct rmodule rmod_stage; + size_t region_size; + char *stage_region; + int rmodule_offset; + int load_offset; + const struct cbmem_entry *cbmem_entry; + + if (stage == NULL || rsl->name == NULL) + return -1; + + rmodule_offset = + rmodule_calc_region(DYN_CBMEM_ALIGN_SIZE, + stage->memlen, ®ion_size, &load_offset); + + cbmem_entry = cbmem_entry_add(rsl->cbmem_id, region_size); + + if (cbmem_entry == NULL) + return -1; + + stage_region = cbmem_entry_start(cbmem_entry); + + printk(BIOS_INFO, "Decompressing stage %s @ 0x%p (%d bytes)\n", + rsl->name, &stage_region[rmodule_offset], stage->memlen); + + if (!cbfs_decompress(stage->compression, &stage[1], + &stage_region[rmodule_offset], stage->len)) + return -1; + + if (rmodule_parse(&stage_region[rmodule_offset], &rmod_stage)) + return -1; + + if (rmodule_load(&stage_region[load_offset], &rmod_stage)) + return -1; + + rsl->cbmem_entry = cbmem_entry; + rsl->entry = rmodule_entry(&rmod_stage); + + return 0; +} + +int rmodule_stage_load_from_cbfs(struct rmod_stage_load *rsl) +{ + struct cbfs_stage *stage; + + stage =cbfs_get_file_content(CBFS_DEFAULT_MEDIA, + rsl->name, CBFS_TYPE_STAGE, NULL); + + if (stage == NULL) + return -1; + + return rmodule_stage_load(rsl, stage); +} + +#endif /* DYNAMIC_CBMEM */ diff --git a/src/vendorcode/google/chromeos/vboot_loader.c b/src/vendorcode/google/chromeos/vboot_loader.c index 91f6237..6eff99c 100644 --- a/src/vendorcode/google/chromeos/vboot_loader.c +++ b/src/vendorcode/google/chromeos/vboot_loader.c @@ -37,59 +37,26 @@
static void vboot_run_stub(struct vboot_context *context) { - const struct cbmem_entry *vboot_entry; - struct rmodule vbootstub; - struct cbfs_stage *stage; - size_t region_size; - int rmodule_offset; - int load_offset; - char *vboot_region; + struct rmod_stage_load rmod_stage = { + .cbmem_id = 0xffffffff, + .name = CONFIG_CBFS_PREFIX "/vboot", + }; void (*entry)(struct vboot_context *context);
- stage = cbfs_get_file_content(CBFS_DEFAULT_MEDIA, - CONFIG_CBFS_PREFIX "/vboot", - CBFS_TYPE_STAGE, NULL); - - if (stage == NULL) - return; - - rmodule_offset = - rmodule_calc_region(DYN_CBMEM_ALIGN_SIZE, - stage->memlen, ®ion_size, &load_offset); - - vboot_entry = cbmem_entry_add(0xffffffff, region_size); - - if (vboot_entry == NULL) { - printk(BIOS_DEBUG, "Couldn't get region for vboot stub.\n"); - return; - } - - vboot_region = cbmem_entry_start(vboot_entry); - - if (!cbfs_decompress(stage->compression, &stage[1], - &vboot_region[rmodule_offset], stage->len)) { - printk(BIOS_DEBUG, "Couldn't decompress vboot stub.\n"); + if (rmodule_stage_load_from_cbfs(&rmod_stage)) { + printk(BIOS_DEBUG, "Could not load vboot stub.\n"); goto out; }
- if (rmodule_parse(&vboot_region[rmodule_offset], &vbootstub)) { - printk(BIOS_DEBUG, "Couldn't parse vboot stub rmodule.\n"); - goto out; - } - - if (rmodule_load(&vboot_region[load_offset], &vbootstub)) { - printk(BIOS_DEBUG, "Couldn't load vboot stub.\n"); - goto out; - } - - entry = rmodule_entry(&vbootstub); + entry = rmod_stage.entry;
/* Call stub. */ entry(context);
out: /* Tear down the region no longer needed. */ - cbmem_entry_remove(vboot_entry); + if (rmod_stage.cbmem_entry != NULL) + cbmem_entry_remove(rmod_stage.cbmem_entry); }
/* Helper routines for the vboot stub. */ @@ -175,14 +142,11 @@ static void vboot_load_ramstage(struct vboot_handoff *vboot_handoff, struct romstage_handoff *handoff) { struct cbfs_stage *stage; - struct rmodule ramstage; - void *entry_point; - size_t region_size; - char *ramstage_region; - int rmodule_offset; - int load_offset; - const struct cbmem_entry *ramstage_entry; const struct firmware_component *fwc; + struct rmod_stage_load rmod_load = { + .cbmem_id = CBMEM_ID_RAMSTAGE, + .name = CONFIG_CBFS_PREFIX "/coreboot_ram", + };
if (CONFIG_VBOOT_RAMSTAGE_INDEX >= MAX_PARSED_FW_COMPONENTS) { printk(BIOS_ERR, "Invalid ramstage index: %d\n", @@ -202,45 +166,22 @@ static void vboot_load_ramstage(struct vboot_handoff *vboot_handoff,
stage = (void *)fwc->address;
- rmodule_offset = - rmodule_calc_region(DYN_CBMEM_ALIGN_SIZE, - stage->memlen, ®ion_size, &load_offset); - - ramstage_entry = cbmem_entry_add(CBMEM_ID_RAMSTAGE, region_size); + timestamp_add_now(TS_START_COPYRAM);
- if (ramstage_entry == NULL) { + if (rmodule_stage_load(&rmod_load, stage)) { vboot_handoff->selected_firmware = VB_SELECT_FIRMWARE_READONLY; - printk(BIOS_DEBUG, "Could not add ramstage region.\n"); + printk(BIOS_DEBUG, "Could not load ramstage region.\n"); return; }
- timestamp_add_now(TS_START_COPYRAM); - - ramstage_region = cbmem_entry_start(ramstage_entry); - - printk(BIOS_DEBUG, "Decompressing ramstage @ 0x%p (%d bytes)\n", - &ramstage_region[rmodule_offset], stage->memlen); - - if (!cbfs_decompress(stage->compression, &stage[1], - &ramstage_region[rmodule_offset], stage->len)) - return; - - if (rmodule_parse(&ramstage_region[rmodule_offset], &ramstage)) - return; - - if (rmodule_load(&ramstage_region[load_offset], &ramstage)) - return; - - entry_point = rmodule_entry(&ramstage); - - cache_loaded_ramstage(handoff, ramstage_entry, entry_point); + cache_loaded_ramstage(handoff, rmod_load.cbmem_entry, rmod_load.entry);
timestamp_add_now(TS_END_COPYRAM);
__asm__ volatile ( "movl $0, %%ebp\n" "jmp *%%edi\n" - :: "D"(entry_point) + :: "D"(rmod_load.entry) ); }