2 * linux/include/asm-arm/arch-iop13xx/system.h
4 * Copyright (C) 2004 Intel Corp.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
10 #include <asm/arch/iop13xx.h>
11 static inline void arch_idle(void)
16 /* WDTCR CP6 R7 Page 9 */
17 static inline u32 read_wdtcr(void)
20 asm volatile("mrc p6, 0, %0, c7, c9, 0":"=r" (val));
23 static inline void write_wdtcr(u32 val)
25 asm volatile("mcr p6, 0, %0, c7, c9, 0"::"r" (val));
28 /* WDTSR CP6 R8 Page 9 */
29 static inline u32 read_wdtsr(void)
32 asm volatile("mrc p6, 0, %0, c8, c9, 0":"=r" (val));
35 static inline void write_wdtsr(u32 val)
37 asm volatile("mcr p6, 0, %0, c8, c9, 0"::"r" (val));
40 #define IOP13XX_WDTCR_EN_ARM 0x1e1e1e1e
41 #define IOP13XX_WDTCR_EN 0xe1e1e1e1
42 #define IOP13XX_WDTCR_DIS_ARM 0x1f1f1f1f
43 #define IOP13XX_WDTCR_DIS 0xf1f1f1f1
44 #define IOP13XX_WDTSR_WRITE_EN (1 << 31)
45 #define IOP13XX_WDTCR_IB_RESET (1 << 0)
46 static inline void arch_reset(char mode)
49 * Reset the internal bus (warning both cores are reset)
51 write_wdtcr(IOP13XX_WDTCR_EN_ARM);
52 write_wdtcr(IOP13XX_WDTCR_EN);
53 write_wdtsr(IOP13XX_WDTSR_WRITE_EN | IOP13XX_WDTCR_IB_RESET);