diff options
Diffstat (limited to 'arch/arm/mach-omap2/include/mach/debug-macro.S')
| -rw-r--r-- | arch/arm/mach-omap2/include/mach/debug-macro.S | 81 |
1 files changed, 36 insertions, 45 deletions
diff --git a/arch/arm/mach-omap2/include/mach/debug-macro.S b/arch/arm/mach-omap2/include/mach/debug-macro.S index 48adfe9fe4f..13f98e59cfe 100644 --- a/arch/arm/mach-omap2/include/mach/debug-macro.S +++ b/arch/arm/mach-omap2/include/mach/debug-macro.S @@ -13,15 +13,10 @@ #include <linux/serial_reg.h> -#include <asm/memory.h> - #include <plat/serial.h> #define UART_OFFSET(addr) ((addr) & 0x00ffffff) -#define omap_uart_v2p(x) ((x) - PAGE_OFFSET + PLAT_PHYS_OFFSET) -#define omap_uart_p2v(x) ((x) - PLAT_PHYS_OFFSET + PAGE_OFFSET) - .pushsection .data omap_uart_phys: .word 0 omap_uart_virt: .word 0 @@ -34,26 +29,25 @@ omap_uart_lsr: .word 0 * the desired UART phys and virt addresses temporarily into * the omap_uart_phys and omap_uart_virt above. */ - .macro addruart, rp, rv + .macro addruart, rp, rv, tmp /* Use omap_uart_phys/virt if already configured */ -10: mrc p15, 0, \rp, c1, c0 - tst \rp, #1 @ MMU enabled? - ldreq \rp, =omap_uart_v2p(omap_uart_phys) @ MMU disabled - ldrne \rp, =omap_uart_phys @ MMU enabled - add \rv, \rp, #4 @ omap_uart_virt - ldr \rp, [\rp, #0] - ldr \rv, [\rv, #0] +10: adr \rp, 99f @ get effective addr of 99f + ldr \rv, [\rp] @ get absolute addr of 99f + sub \rv, \rv, \rp @ offset between the two + ldr \rp, [\rp, #4] @ abs addr of omap_uart_phys + sub \tmp, \rp, \rv @ make it effective + ldr \rp, [\tmp, #0] @ omap_uart_phys + ldr \rv, [\tmp, #4] @ omap_uart_virt cmp \rp, #0 @ is port configured? cmpne \rv, #0 - bne 99f @ already configured + bne 100f @ already configured /* Check the debug UART configuration set in uncompress.h */ - mrc p15, 0, \rp, c1, c0 - tst \rp, #1 @ MMU enabled? - ldreq \rp, =OMAP_UART_INFO @ MMU not enabled - ldrne \rp, =omap_uart_p2v(OMAP_UART_INFO) @ MMU enabled - ldr \rp, [\rp, #0] + mov \rp, pc + ldr \rv, =OMAP_UART_INFO_OFS + and \rp, \rp, #0xff000000 + ldr \rp, [\rp, \rv] /* Select the UART to use based on the UART1 scratchpad value */ cmp \rp, #0 @ no port configured? @@ -106,50 +100,47 @@ omap_uart_lsr: .word 0 b 98f 83: mov \rp, #UART_OFFSET(TI816X_UART3_BASE) b 98f + 95: ldr \rp, =ZOOM_UART_BASE - mrc p15, 0, \rv, c1, c0 - tst \rv, #1 @ MMU enabled? - ldreq \rv, =omap_uart_v2p(omap_uart_phys) @ MMU disabled - ldrne \rv, =omap_uart_phys @ MMU enabled - str \rp, [\rv, #0] + str \rp, [\tmp, #0] @ omap_uart_phys ldr \rp, =ZOOM_UART_VIRT - add \rv, \rv, #4 @ omap_uart_virt - str \rp, [\rv, #0] + str \rp, [\tmp, #4] @ omap_uart_virt mov \rp, #(UART_LSR << ZOOM_PORT_SHIFT) - add \rv, \rv, #4 @ omap_uart_lsr - str \rp, [\rv, #0] + str \rp, [\tmp, #8] @ omap_uart_lsr b 10b /* Store both phys and virt address for the uart */ 98: add \rp, \rp, #0x48000000 @ phys base - mrc p15, 0, \rv, c1, c0 - tst \rv, #1 @ MMU enabled? - ldreq \rv, =omap_uart_v2p(omap_uart_phys) @ MMU disabled - ldrne \rv, =omap_uart_phys @ MMU enabled - str \rp, [\rv, #0] + str \rp, [\tmp, #0] @ omap_uart_phys sub \rp, \rp, #0x48000000 @ phys base add \rp, \rp, #0xfa000000 @ virt base - add \rv, \rv, #4 @ omap_uart_virt - str \rp, [\rv, #0] + str \rp, [\tmp, #4] @ omap_uart_virt mov \rp, #(UART_LSR << OMAP_PORT_SHIFT) - add \rv, \rv, #4 @ omap_uart_lsr - str \rp, [\rv, #0] + str \rp, [\tmp, #8] @ omap_uart_lsr b 10b -99: + + .align +99: .word . + .word omap_uart_phys + .ltorg + +100: /* Pass the UART_LSR reg address */ + ldr \tmp, [\tmp, #8] @ omap_uart_lsr + add \rp, \rp, \tmp + add \rv, \rv, \tmp .endm .macro senduart,rd,rx - strb \rd, [\rx] + orr \rd, \rd, \rx, lsl #24 @ preserve LSR reg offset + bic \rx, \rx, #0xff @ get base (THR) reg address + strb \rd, [\rx] @ send lower byte of rd + orr \rx, \rx, \rd, lsr #24 @ restore original rx (LSR) + bic \rd, \rd, #(0xff << 24) @ restore original rd .endm .macro busyuart,rd,rx -1001: mrc p15, 0, \rd, c1, c0 - tst \rd, #1 @ MMU enabled? - ldreq \rd, =omap_uart_v2p(omap_uart_lsr) @ MMU disabled - ldrne \rd, =omap_uart_lsr @ MMU enabled - ldr \rd, [\rd, #0] - ldrb \rd, [\rx, \rd] +1001: ldrb \rd, [\rx] @ rx contains UART_LSR address and \rd, \rd, #(UART_LSR_TEMT | UART_LSR_THRE) teq \rd, #(UART_LSR_TEMT | UART_LSR_THRE) bne 1001b |