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Introduce rom_copy

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We have several rom helpers currently, but none of them can get us
code that spans several roms into a pointer.

This patch introduces a function that copies over rom contents.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Alexander Graf 2009-11-12 21:53:11 +01:00 committed by Anthony Liguori
parent ff06108b18
commit 235f86ef01
2 changed files with 39 additions and 0 deletions
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38
hw/loader.c
View File

@ -708,6 +708,44 @@ static Rom *find_rom(target_phys_addr_t addr)
return NULL;
}
int rom_copy(uint8_t *dest, target_phys_addr_t addr, size_t size)
{
target_phys_addr_t end = addr + size;
uint8_t *s, *d = dest;
size_t l = 0;
Rom *rom;
QTAILQ_FOREACH(rom, &roms, next) {
if (rom->max)
continue;
if (rom->min > addr)
continue;
if (rom->min + rom->romsize < addr)
continue;
if (rom->min > end)
break;
if (!rom->data)
continue;
d = dest + (rom->min - addr);
s = rom->data;
l = rom->romsize;
if (rom->min < addr) {
d = dest;
s += (addr - rom->min);
l -= (addr - rom->min);
}
if ((d + l) > (dest + size)) {
l = dest - d;
}
memcpy(d, s, l);
}
return (d + l) - dest;
}
void *rom_ptr(target_phys_addr_t addr)
{
Rom *rom;

1
hw/loader.h
View File

@ -24,6 +24,7 @@ int rom_add_file(const char *file,
int rom_add_blob(const char *name, const void *blob, size_t len,
target_phys_addr_t min, target_phys_addr_t max, int align);
int rom_load_all(void);
int rom_copy(uint8_t *dest, target_phys_addr_t addr, size_t size);
void *rom_ptr(target_phys_addr_t addr);
void do_info_roms(Monitor *mon);