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This patch changes following in getpir application. 

1 - Moved the check sum validation to probe_table function.
2 - Proper handling of resources allocated.
3 - Signature check is done in 16 byte boundaries.
4 - irq_tables.c file is created only if a valid PIRQ table is found.
5 – Makefile and README file are modified accordingly.

Signed-off-by: Mohamed Mansoor <mansoor@iwavesystems.com>
Acked-by: Stefan Reinauer <stepan@coresystems.de>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4680 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Mohamed Mansoor 2009-09-26 16:18:22 +00:00 committed by Stefan Reinauer
parent 5db685fedf
commit bde683ce9f
3 changed files with 50 additions and 40 deletions
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3
util/getpir/Makefile
View File

@ -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 $^

36
util/getpir/README
View File

@ -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 linux bios 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 coreboot tree.
CHECKING CUSTOM irq_tables.c:
4. CHECKING CUSTOM irq_tables.c:
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:
make checkpir
./checkpir
make test
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.
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.

51
util/getpir/getpir.c
View File

@ -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);
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 (rt != NULL) {
printf("Found PCI IRQ routing table signature at %p.\n",
(void *)((char *)rt - ptr + 0xf0000));
} else {
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;
}