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/*
* linux/include/asm-arm/arch-iop13xx/system.h
*
* Copyright (C) 2004 Intel Corp.
*
* 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.
*/
#include <asm/arch/iop13xx.h>
static inline void arch_idle(void)
{
cpu_do_idle();
}
/* WDTCR CP6 R7 Page 9 */
static inline u32 read_wdtcr(void)
{
u32 val;
asm volatile("mrc p6, 0, %0, c7, c9, 0":"=r" (val));
return val;
}
static inline void write_wdtcr(u32 val)
{
asm volatile("mcr p6, 0, %0, c7, c9, 0"::"r" (val));
}
/* WDTSR CP6 R8 Page 9 */
static inline u32 read_wdtsr(void)
{
u32 val;
asm volatile("mrc p6, 0, %0, c8, c9, 0":"=r" (val));
return val;
}
static inline void write_wdtsr(u32 val)
{
asm volatile("mcr p6, 0, %0, c8, c9, 0"::"r" (val));
}
#define IOP13XX_WDTCR_EN_ARM 0x1e1e1e1e
#define IOP13XX_WDTCR_EN 0xe1e1e1e1
#define IOP13XX_WDTCR_DIS_ARM 0x1f1f1f1f
#define IOP13XX_WDTCR_DIS 0xf1f1f1f1
#define IOP13XX_WDTSR_WRITE_EN (1 << 31)
#define IOP13XX_WDTCR_IB_RESET (1 << 0)
static inline void arch_reset(char mode)
{
/*
* Reset the internal bus (warning both cores are reset)
*/
u32 cp_flags = iop13xx_cp6_save();
write_wdtcr(IOP13XX_WDTCR_EN_ARM);
write_wdtcr(IOP13XX_WDTCR_EN);
write_wdtsr(IOP13XX_WDTSR_WRITE_EN | IOP13XX_WDTCR_IB_RESET);
write_wdtcr(0x1000);
iop13xx_cp6_restore(cp_flags);
for(;;);
}
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