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Abstract mmap() in physmap.c and only open /dev/mem on the first physmap() call

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Corresponding to flashrom svn r397 and coreboot v2 svn r3903.

Signed-off-by: Stefan Reinauer <stepan@coresystems.de>
Signed-off-by: Peter Stuge <peter@stuge.se>
Acked-by: Peter Stuge <peter@stuge.se>
This commit is contained in:
Stefan Reinauer
2009-01-26 01:10:48 +00:00
committed by Peter Stuge
parent 776d2021fd
commit 0593f21f10
6 changed files with 71 additions and 88 deletions
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34
chipset_enable.c
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@ -215,14 +215,7 @@ static int enable_flash_vt8237s_spi(struct pci_dev *dev, const char *name)
mmio_base = (pci_read_long(dev, 0xbc)) << 8;
printf_debug("MMIO base at = 0x%x\n", mmio_base);
spibar = mmap(NULL, 0x70, PROT_READ | PROT_WRITE, MAP_SHARED,
fd_mem, mmio_base);
if (spibar == MAP_FAILED) {
perror("Can't mmap memory using " MEM_DEV);
mmap_errmsg();
exit(1);
}
spibar = physmap("VT8237S MMIO registers", mmio_base, 0x70);
printf_debug("0x6c: 0x%04x (CLOCK/DEBUG)\n",
*(uint16_t *) (spibar + 0x6c));
@ -252,13 +245,7 @@ static int enable_flash_ich_dc_spi(struct pci_dev *dev, const char *name,
printf_debug("\nRoot Complex Register Block address = 0x%x\n", tmp);
/* Map RCBA to virtual memory */
rcrb = mmap(0, 0x4000, PROT_READ | PROT_WRITE, MAP_SHARED, fd_mem,
(off_t) tmp);
if (rcrb == MAP_FAILED) {
perror("Can't mmap memory using " MEM_DEV);
mmap_errmsg();
exit(1);
}
rcrb = physmap("ICH RCRB", tmp, 0x4000);
gcs = *(volatile uint32_t *)(rcrb + 0x3410);
printf_debug("GCS = 0x%x: ", gcs);
@ -679,13 +666,7 @@ static int enable_flash_sb600(struct pci_dev *dev, const char *name)
tmp &= 0xffffc000;
printf_debug("SPI base address is at 0x%x\n", tmp + low_bits);
sb600_spibar = mmap(0, 0x4000, PROT_READ | PROT_WRITE, MAP_SHARED,
fd_mem, (off_t)tmp);
if (sb600_spibar == MAP_FAILED) {
perror("Can't mmap memory using " MEM_DEV);
mmap_errmsg();
exit(1);
}
sb600_spibar = physmap("SB600 SPI registers", tmp, 0x4000);
sb600_spibar += low_bits;
/* Clear ROM protect 0-3. */
@ -835,14 +816,7 @@ static int get_flashbase_sc520(struct pci_dev *dev, const char *name)
void *mmcr;
/* 1. Map MMCR */
mmcr = mmap(0, getpagesize(), PROT_WRITE | PROT_READ,
MAP_SHARED, fd_mem, (off_t)0xFFFEF000);
if (mmcr == MAP_FAILED) {
perror("Can't mmap Elan SC520 specific registers using " MEM_DEV);
mmap_errmsg();
exit(1);
}
mmcr = physmap("Elan SC520 MMCR", 0xfffef000, getpagesize());
/* 2. Scan PAR0 (0x88) - PAR15 (0xc4) for
* BOOTCS region (PARx[31:29] = 100b)e