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| author | Alexandre Belloni <alexandre.belloni@free-electrons.com> | 2015-01-12 21:42:14 +0300 |
|---|---|---|
| committer | Nicolas Ferre <nicolas.ferre@atmel.com> | 2015-01-15 17:24:06 +0300 |
| commit | 5f58c97099f20cb12b463d3bb8bf0cbe522deb22 (patch) | |
| tree | 36c485eb3e3409e4ad7c42c138e33e47c578430a /arch/arm/include/debug | |
| parent | 415c94743524696d66e2bbbc00b72ad593cb0187 (diff) | |
| download | linux-5f58c97099f20cb12b463d3bb8bf0cbe522deb22.tar.xz | |
ARM: at91: move debug-macro.S into the common space
Move debug-macro.S from include/mach/ to include/debug where all other common
debug macros are.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Diffstat (limited to 'arch/arm/include/debug')
| -rw-r--r-- | arch/arm/include/debug/at91.S | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/arch/arm/include/debug/at91.S b/arch/arm/include/debug/at91.S new file mode 100644 index 000000000000..80a6501b4d50 --- /dev/null +++ b/arch/arm/include/debug/at91.S @@ -0,0 +1,49 @@ +/* + * Copyright (C) 2003-2005 SAN People + * + * Debugging macro include header + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * +*/ + +#if defined(CONFIG_AT91_DEBUG_LL_DBGU0) +#define AT91_DBGU 0xfffff200 /* AT91_BASE_DBGU0 */ +#elif defined(CONFIG_AT91_DEBUG_LL_DBGU1) +#define AT91_DBGU 0xffffee00 /* AT91_BASE_DBGU1 */ +#else +/* On sama5d4, use USART3 as low level serial console */ +#define AT91_DBGU 0xfc00c000 /* SAMA5D4_BASE_USART3 */ +#endif + +/* Keep in sync with mach-at91/include/mach/hardware.h */ +#define AT91_IO_P2V(x) ((x) - 0x01000000) + +#define AT91_DBGU_SR (0x14) /* Status Register */ +#define AT91_DBGU_THR (0x1c) /* Transmitter Holding Register */ +#define AT91_DBGU_TXRDY (1 << 1) /* Transmitter Ready */ +#define AT91_DBGU_TXEMPTY (1 << 9) /* Transmitter Empty */ + + .macro addruart, rp, rv, tmp + ldr \rp, =AT91_DBGU @ System peripherals (phys address) + ldr \rv, =AT91_IO_P2V(AT91_DBGU) @ System peripherals (virt address) + .endm + + .macro senduart,rd,rx + strb \rd, [\rx, #(AT91_DBGU_THR)] @ Write to Transmitter Holding Register + .endm + + .macro waituart,rd,rx +1001: ldr \rd, [\rx, #(AT91_DBGU_SR)] @ Read Status Register + tst \rd, #AT91_DBGU_TXRDY @ DBGU_TXRDY = 1 when ready to transmit + beq 1001b + .endm + + .macro busyuart,rd,rx +1001: ldr \rd, [\rx, #(AT91_DBGU_SR)] @ Read Status Register + tst \rd, #AT91_DBGU_TXEMPTY @ DBGU_TXEMPTY = 1 when transmission complete + beq 1001b + .endm + |