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Revert MMIO space writes on shutdown as needed

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Reversible MMIO space writes now use rmmio_write*().
Reversible PCI MMIO space writes now use pci_rmmio_write*().
If a MMIO value needs to be queued for restore without writing it,
use rmmio_val*().
MMIO space writes which are one-shot (e.g. communication with some chip)
should continue to use the permanent mmio_write* variants.

Corresponding to flashrom svn r1292.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>

David tested it successfully on some NM10/ICH7 platforms which switch
between SPI and LPC targets (x86 BIOS ROM vs. EC firmware ROM).

Acked-by: David Hendricks <dhendrix@google.com>
This commit is contained in:
Carl-Daniel Hailfinger
2011-05-03 21:49:41 +00:00
parent 8ed293416d
commit 54ce73a1f5
5 changed files with 157 additions and 20 deletions
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12
programmer.h
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@ -316,6 +316,18 @@ uint32_t mmio_le_readl(void *addr);
#define pci_mmio_readb mmio_le_readb
#define pci_mmio_readw mmio_le_readw
#define pci_mmio_readl mmio_le_readl
void rmmio_writeb(uint8_t val, void *addr);
void rmmio_writew(uint16_t val, void *addr);
void rmmio_writel(uint32_t val, void *addr);
void rmmio_le_writeb(uint8_t val, void *addr);
void rmmio_le_writew(uint16_t val, void *addr);
void rmmio_le_writel(uint32_t val, void *addr);
#define pci_rmmio_writeb rmmio_le_writeb
#define pci_rmmio_writew rmmio_le_writew
#define pci_rmmio_writel rmmio_le_writel
void rmmio_valb(void *addr);
void rmmio_valw(void *addr);
void rmmio_vall(void *addr);
/* programmer.c */
int noop_shutdown(void);