Use accessor functions for MMIO

Some MMIO accesses used volatile, others didn't (and risked
non-execution of side effects) and even with volatile, some accesses
looked dubious.

Since the MMIO accessor functions and the onboard flash accessor
functions are functionally identical (but have different signatures),
make the flash accessors wrappers for the MMIO accessors.

For some of the conversions, I used Coccinelle. Semantic patch follows:

@@ typedef uint8_t; expression a; volatile uint8_t *b; @@ - b[a] + *(b
+ a) @@ expression a; volatile uint8_t *b; @@ - *(b) |= (a); + *(b) =
*(b) | (a); @@ expression a; volatile uint8_t *b; @@ - *(b) = (a); +
mmio_writeb(a, b); @@ volatile uint8_t *b; @@ - *(b) + mmio_readb(b) @@
type T; T b; @@ ( mmio_readb | mmio_writeb ) (..., - (T) - (b) + b )

Corresponding to flashrom svn r524.

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

Uwe tested read, write, erase with this patch on a random board to make
sure nothing breaks.

Acked-by: Uwe Hermann <uwe@hermann-uwe.de>

1 files changed, 7 insertions, 1 deletions

diff --git a/flash.h b/flash.h
index f6bdab0..d172ac1 100644
--- a/flash.h
+++ b/flash.h
@@ -621,6 +621,12 @@ void internal_chip_writel(uint32_t val, chipaddr addr);
 uint8_t internal_chip_readb(const chipaddr addr);
 uint16_t internal_chip_readw(const chipaddr addr);
 uint32_t internal_chip_readl(const chipaddr addr);
+void mmio_writeb(uint8_t val, void *addr);
+void mmio_writew(uint16_t val, void *addr);
+void mmio_writel(uint32_t val, void *addr);
+uint8_t mmio_readb(void *addr);
+uint16_t mmio_readw(void *addr);
+uint32_t mmio_readl(void *addr);
 void fallback_chip_writew(uint16_t val, chipaddr addr);
 void fallback_chip_writel(uint32_t val, chipaddr addr);
 uint16_t fallback_chip_readw(const chipaddr addr);
@@ -731,7 +737,7 @@ int sb600_spi_command(unsigned int writecnt, unsigned int readcnt,
 int sb600_spi_read(struct flashchip *flash, uint8_t *buf);
 int sb600_spi_write_1(struct flashchip *flash, uint8_t *buf);
 uint8_t sb600_read_status_register(void);
-extern uint8_t volatile *sb600_spibar;
+extern uint8_t *sb600_spibar;
 
 /* jedec.c */
 uint8_t oddparity(uint8_t val);