diff options
Diffstat (limited to 'util')
| -rw-r--r-- | util/getpir/Makefile | 3 | ||||
| -rw-r--r-- | util/getpir/README | 36 | ||||
| -rw-r--r-- | util/getpir/getpir.c | 53 |
3 files changed, 51 insertions, 41 deletions
diff --git a/util/getpir/Makefile b/util/getpir/Makefile index 13bf47efc9..94270f54a6 100644 --- a/util/getpir/Makefile +++ b/util/getpir/Makefile @@ -5,8 +5,7 @@ CC=gcc CFLAGS=-O2 -D_GNU_SOURCE -DGETPIR -Wall -all: getpir checkpir - ./checkpir +all: getpir getpir: getpir.o checksum.o code_gen.o $(CC) $(CFLAGS) -o getpir $^ diff --git a/util/getpir/README b/util/getpir/README index 6c5d6e2b53..33d0de2a93 100644 --- a/util/getpir/README +++ b/util/getpir/README @@ -1,28 +1,30 @@ ABOUT: -This utility will help to create irq_table.c file, that is very hard to create manually, -specialy when you are testing new motherboards, changing your hardware often, placing new cards, etc.. - - -INSTALL: - -edit Makefile, define the root to coreboot tree -make +This utility will help to create irq_table.c file, that is very hard to create +manually, specialy when you are testing new motherboards, changing your +hardware often, placing new cards, etc.. USAGE: -./getpir +Steps +1. make distclean; +2. make getpir +3. ./getpir + + Will dump irq table to the file called irq_tables.c, ready to use with + coreboot. Just move the file to corresponding place in the coreboot tree. -Will dump irq table to the file called irq_tables.c, ready to use with coreboot. Just move the -file to corresponding place in the linux bios tree. +4. CHECKING CUSTOM irq_tables.c: -CHECKING CUSTOM irq_tables.c: + make checkpir + ./checkpir -checkpir.c Will verify the irq_tables.c, currently it only checks the checksum. In case of wrong -checksum, a good value is proposed, so you can edit irq_tables.c manualy and replace checksum. -Run the command like this: + checkpir.c Will verify the irq_tables.c, currently it only checks the + checksum. In case of wrong checksum, a good value is proposed, so you can + edit irq_tables.c manualy and replace checksum. + -make test +Do not run make checkpir and ./checkpir directly because it needs to be linked +to irq_table.o first. -Do not run ./checkpir directly because it needs to be linked to irq_table.o first. diff --git a/util/getpir/getpir.c b/util/getpir/getpir.c index d0ad978a40..6fc3a95d8a 100644 --- a/util/getpir/getpir.c +++ b/util/getpir/getpir.c @@ -28,31 +28,45 @@ static struct irq_routing_table *probe_table(int fd_mem) { char *ptr, signature[] = "$PIR"; struct irq_routing_table *rt; + int size = 16; - ptr = mmap(0, 0x10000, PROT_READ, MAP_SHARED, - fd_mem, (off_t) 0xf0000); + ptr = mmap(0, 0x10000, PROT_READ, MAP_SHARED, + fd_mem, (off_t) 0xf0000); if (ptr == MAP_FAILED) { perror("Mapping system memory failed: "); - exit(1); + return NULL; } - rt = (struct irq_routing_table *) memmem(ptr, 0xFFFF, signature, 4); - - if (rt != NULL) { - printf("Found PCI IRQ routing table signature at %p.\n", - (void *)((char *)rt - ptr + 0xf0000)); - } else { + do { + rt = (struct irq_routing_table *) memmem(ptr + size, 16, signature, 4); + if (rt != NULL) { + printf("Found PCI IRQ routing table signature at %p.\n", + (void *) ((char *) rt - ptr + 0xf0000)); + printf("Validating... "); + if (!calc_checksum(rt)) { + printf("checksum is ok.\n"); + break; + } else { + printf("checksum is wrong.\n"); + } + } + size += 16; + } while (size < 0xFFFF); + + if (size >= 0xFFFF) { printf("No PCI IRQ routing table signature found.\n"); - exit(1); + munmap(ptr, 0x10000); + return NULL; } + return rt; } int main(void) { int fd_mem; - struct irq_routing_table *rt; + struct irq_routing_table *rt; if (getuid()) { fprintf(stderr, "Run me as root, I need access to " MEM_DEV ".\n"); @@ -66,19 +80,14 @@ int main(void) printf("Probing PIRQ table in memory.\n"); rt = probe_table(fd_mem); - - printf("Validating... "); - if (!calc_checksum(rt)) - printf("checksum is ok.\n"); - else - printf("checksum is wrong.\n"); - - printf("Creating irq_tables.c ...\n"); - code_gen("irq_tables.c", rt); - + if (rt != NULL) { + printf("Creating irq_tables.c ...\n"); + code_gen("irq_tables.c", rt); + printf + ("Done, you can move the file to the coreboot tree now.\n"); + } close(fd_mem); - printf("Done, you can move the file to the coreboot tree now.\n"); return 0; } |