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ARM: mach-davinci: make DAVINCI_UART_INFO into a relative offset

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This is the first step to remove PLAT_PHYS_OFFSET usage from the debug
UART code.

Signed-off-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Reviewed-by: Kevin Hilman <khilman@ti.com>
Tested-by: Kevin Hilman <khilman@ti.com>
This commit is contained in:
Nicolas Pitre 2011-09-01 20:32:21 -04:00 committed by Nicolas Pitre
parent fa808a1ba5
commit e020fe34f8
3 changed files with 18 additions and 13 deletions
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21
arch/arm/mach-davinci/include/mach/debug-macro.S
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@ -50,21 +50,20 @@ davinci_uart_virt: .word 0
mrc p15, 0, \rp, c1, c0
tst \rp, #1 @ MMU enabled?
/* Copy uart phys address from decompressor uart info */
and \rp, pc, #0xff000000
ldr \rv, =DAVINCI_UART_INFO_OFS
add \rp, \rp, \rv
ldreq \rv, =davinci_uart_v2p(davinci_uart_phys)
ldrne \rv, =davinci_uart_phys
ldreq \rp, =DAVINCI_UART_INFO
ldrne \rp, =davinci_uart_p2v(DAVINCI_UART_INFO)
ldr \rp, [\rp, #0]
str \rp, [\rv]
/* Copy uart phys address from decompressor uart info */
ldr \tmp, [\rp, #0]
str \tmp, [\rv, #0]
/* Copy uart virt address from decompressor uart info */
ldreq \rv, =davinci_uart_v2p(davinci_uart_virt)
ldrne \rv, =davinci_uart_virt
ldreq \rp, =DAVINCI_UART_INFO
ldrne \rp, =davinci_uart_p2v(DAVINCI_UART_INFO)
ldr \rp, [\rp, #4]
str \rp, [\rv]
ldr \tmp, [\rp, #4]
str \tmp, [\rv, #4]
b 10b
99:

3
arch/arm/mach-davinci/include/mach/serial.h
View File

@ -21,8 +21,9 @@
* macros in debug-macro.S.
*
* This area sits just below the page tables (see arch/arm/kernel/head.S).
* We define it as a relative offset from start of usable RAM.
*/
#define DAVINCI_UART_INFO (PLAT_PHYS_OFFSET + 0x3ff8)
#define DAVINCI_UART_INFO_OFS 0x3ff8
#define DAVINCI_UART0_BASE (IO_PHYS + 0x20000)
#define DAVINCI_UART1_BASE (IO_PHYS + 0x20400)

7
arch/arm/mach-davinci/include/mach/uncompress.h
View File

@ -43,7 +43,12 @@ static inline void flush(void)
static inline void set_uart_info(u32 phys, void * __iomem virt)
{
u32 *uart_info = (u32 *)(DAVINCI_UART_INFO);
/*
* Get address of some.bss variable and round it down
* a la CONFIG_AUTO_ZRELADDR.
*/
u32 ram_start = (u32)&uart & 0xf8000000;
u32 *uart_info = (u32 *)(ram_start + DAVINCI_UART_INFO_OFS);
uart = (u32 *)phys;
uart_info[0] = phys;