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Diffstat (limited to 'xen/arch/arm/arm32/debug.S')
| -rw-r--r-- | xen/arch/arm/arm32/debug.S | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/xen/arch/arm/arm32/debug.S b/xen/arch/arm/arm32/debug.S new file mode 100644 index 0000000000..09e5cae2e2 --- /dev/null +++ b/xen/arch/arm/arm32/debug.S @@ -0,0 +1,33 @@ +/* + * xen/arch/arm/arm32/debug.S + * + * Wrapper for early printk + * + * Julien Grall <julien.grall@linaro.org> + * Copyright (c) 2013 Linaro Limited. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <asm/config.h> + +#ifdef EARLY_PRINTK_INC +#include EARLY_PRINTK_INC +#endif + +.globl early_putch +/* Print a character on the UART - this function is called by C + * r0: character to print */ +early_putch: + ldr r1, =FIXMAP_ADDR(FIXMAP_CONSOLE) /* r1 := VA UART base address */ + early_uart_ready r1, r2 + early_uart_transmit r1, r0 + mov pc, lr |