Aaron Durbin (adurbin@chromium.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/10261
-gerrit
commit e262b6e6bcd293c8fad511e837c7a6b3bb2772f5 Author: Aaron Durbin adurbin@chromium.org Date: Tue May 19 16:25:20 2015 -0500
prog_loading: add region_device representing memory
One can remove the struct buffer_area and use the region_device embedded in the struct prog to represent the in-memory loaded program. Do this by introducing a addrspace_32bit mem_region_device that can have region_device operations performed on it. The addrspace_32bit name was chosen to make it explicit that 32-bits of address space is supported at the max.
Change-Id: Ifffa0ef301141de940e54581b5a7b6cd81311ead Signed-off-by: Aaron Durbin adurbin@chromium.org --- src/include/program_loading.h | 34 ++++++++++++++++++---------------- src/lib/prog_loaders.c | 3 +++ 2 files changed, 21 insertions(+), 16 deletions(-)
diff --git a/src/include/program_loading.h b/src/include/program_loading.h index 05f5e3e..d8e7de3 100644 --- a/src/include/program_loading.h +++ b/src/include/program_loading.h @@ -34,11 +34,6 @@ enum { * set on the last segment loaded. */ void arch_segment_loaded(uintptr_t start, size_t size, int flags);
-struct buffer_area { - void *data; - size_t size; -}; - enum prog_type { PROG_VERSTAGE, PROG_ROMSTAGE, @@ -51,28 +46,27 @@ enum prog_type { struct prog { enum prog_type type; const char *name; - /* Source of program content to load. */ + /* Source of program content to load. After loading program it + * represents the memory region of the stages and payload. For + * achitectures that use a bounce buffer then it would represent + * the bounce buffer. */ struct region_device rdev; - /* The area can mean different things depending on what type the - * program is. A stage after being loaded reflects the memory occupied - * by the program, Since payloads are multi-segment one can't express - * the memory layout with one range. Instead this field is updated - * to reflect the bounce buffer used. */ - struct buffer_area area; /* Entry to program with optional argument. It's up to the architecture * to decide if argument is passed. */ void (*entry)(void *); void *arg; };
+/* Only valid for loaded programs. */ static inline size_t prog_size(const struct prog *prog) { - return prog->area.size; + return region_device_sz(&prog->rdev); }
+/* Only valid for loaded programs. */ static inline void *prog_start(const struct prog *prog) { - return prog->area.data; + return rdev_mmap_full(&prog->rdev); }
static inline void *prog_entry(const struct prog *prog) @@ -85,10 +79,18 @@ static inline void *prog_entry_arg(const struct prog *prog) return prog->arg; }
+/* region_device representing the 32-bit flat address space. */ +extern const struct mem_region_device addrspace_32bit; + +static inline void prog_memory_init(struct prog *prog, uintptr_t ptr, + size_t size) +{ + rdev_chain(&prog->rdev, &addrspace_32bit.rdev, ptr, size); +} + static inline void prog_set_area(struct prog *prog, void *start, size_t size) { - prog->area.data = start; - prog->area.size = size; + prog_memory_init(prog, (uintptr_t)start, size); }
static inline void prog_set_entry(struct prog *prog, void *e, void *arg) diff --git a/src/lib/prog_loaders.c b/src/lib/prog_loaders.c index 881cd99..7799994 100644 --- a/src/lib/prog_loaders.c +++ b/src/lib/prog_loaders.c @@ -35,6 +35,9 @@ #include <symbols.h> #include <timestamp.h>
+/* Only can represent up to 1 byte less than size_t. */ +const struct mem_region_device addrspace_32bit = MEM_REGION_DEV_INIT(0, ~0UL); + #define DEFAULT_CBFS_LOADER_PRESENT \ (!ENV_VERSTAGE || (ENV_VERSTAGE && !CONFIG_RETURN_FROM_VERSTAGE))