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omap: Make uncompress code and DEBUG_LL code generic

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Define arch_decomp_setup() the same way as some other
architectures do. Use arch_id to configure the debug uart
based on the machine_is by storing it into the uart
scratchpad register for DEBUG_LL code to use.

Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Tony Lindgren
2010-02-15 08:49:01 -08:00
parent 4f2c49fedf
commit 0c8219f030
4 changed files with 321 additions and 81 deletions
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72
arch/arm/mach-omap1/include/mach/debug-macro.S
View File

@@ -15,18 +15,76 @@
#include <plat/serial.h>
.pushsection .data
omap_uart_phys: .word 0x0
omap_uart_virt: .word 0x0
.popsection
/*
* Note that this code won't work if the bootloader passes
* a wrong machine ID number in r1. To debug, just hardcode
* the desired UART phys and virt addresses temporarily into
* the omap_uart_phys and omap_uart_virt above.
*/
.macro addruart, rx, tmp
/* Use omap_uart_phys/virt if already configured */
9: mrc p15, 0, \rx, c1, c0
tst \rx, #1 @ MMU enabled?
ldreq \rx, =omap_uart_phys @ physical base address
ldrne \rx, =omap_uart_virt @ virtual base
ldr \rx, [\rx, #0]
cmp \rx, #0 @ is port configured?
bne 99f @ already configured
/* Check 7XX UART1 scratchpad register for uart to use */
mrc p15, 0, \rx, c1, c0
tst \rx, #1 @ MMU enabled?
moveq \rx, #0xff000000 @ physical base address
movne \rx, #0xfe000000 @ virtual base
orr \rx, \rx, #0x00fb0000
#ifdef CONFIG_OMAP_LL_DEBUG_UART3
orr \rx, \rx, #0x00009000 @ UART 3
#endif
#if defined(CONFIG_OMAP_LL_DEBUG_UART2) || defined(CONFIG_OMAP_LL_DEBUG_UART3)
orr \rx, \rx, #0x00000800 @ UART 2 & 3
#endif
orr \rx, \rx, #0x00fb0000 @ OMAP1UART1
ldrb \rx, [\rx, #(UART_SCR << OMAP7XX_PORT_SHIFT)]
cmp \rx, #0 @ anything in 7XX scratchpad?
bne 10f @ found 7XX uart
/* Check 15xx/16xx UART1 scratchpad register for uart to use */
mrc p15, 0, \rx, c1, c0
tst \rx, #1 @ MMU enabled?
moveq \rx, #0xff000000 @ physical base address
movne \rx, #0xfe000000 @ virtual base
orr \rx, \rx, #0x00fb0000 @ OMAP1UART1
ldrb \rx, [\rx, #(UART_SCR << OMAP_PORT_SHIFT)]
/* Select the UART to use based on the UART1 scratchpad value */
10: cmp \rx, #0 @ no port configured?
beq 11f @ if none, try to use UART1
cmp \rx, #OMAP1UART1
beq 11f @ configure OMAP1UART1
cmp \rx, #OMAP1UART2
beq 12f @ configure OMAP1UART2
cmp \rx, #OMAP1UART3
beq 13f @ configure OMAP2UART3
/* Configure the UART offset from the phys/virt base */
11: mov \rx, #0x00fb0000 @ OMAP1UART1
b 98f
12: mov \rx, #0x00fb0000 @ OMAP1UART1
orr \rx, \rx, #0x00000800 @ OMAP1UART2
b 98f
13: mov \rx, #0x00fb0000 @ OMAP1UART1
orr \rx, \rx, #0x00000800 @ OMAP1UART2
orr \rx, \rx, #0x00009000 @ OMAP1UART3
/* Store both phys and virt address for the uart */
98: add \rx, \rx, #0xff000000 @ phys base
ldr \tmp, =omap_uart_phys
str \rx, [\tmp, #0]
sub \rx, \rx, #0xff000000 @ phys base
add \rx, \rx, #0xfe000000 @ virt base
ldr \tmp, =omap_uart_virt
str \rx, [\tmp, #0]
b 9b
99:
.endm
.macro senduart,rd,rx