| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/include/asm-arm/arch-ebsa285/system.h |
| 3 | * |
| 4 | * Copyright (C) 1996-1999 Russell King. |
| 5 | * |
| 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. |
| 9 | */ |
| 10 | #include <asm/hardware/dec21285.h> |
| 11 | #include <asm/io.h> |
| 12 | #include <asm/hardware.h> |
| 13 | #include <asm/leds.h> |
| 14 | #include <asm/mach-types.h> |
| 15 | |
| 16 | static inline void arch_idle(void) |
| 17 | { |
| 18 | cpu_do_idle(); |
| 19 | } |
| 20 | |
| 21 | static inline void arch_reset(char mode) |
| 22 | { |
| 23 | if (mode == 's') { |
| 24 | /* |
| 25 | * Jump into the ROM |
| 26 | */ |
| 27 | cpu_reset(0x41000000); |
| 28 | } else { |
| 29 | if (machine_is_netwinder()) { |
| 30 | /* open up the SuperIO chip |
| 31 | */ |
| 32 | outb(0x87, 0x370); |
| 33 | outb(0x87, 0x370); |
| 34 | |
| 35 | /* aux function group 1 (logical device 7) |
| 36 | */ |
| 37 | outb(0x07, 0x370); |
| 38 | outb(0x07, 0x371); |
| 39 | |
| 40 | /* set GP16 for WD-TIMER output |
| 41 | */ |
| 42 | outb(0xe6, 0x370); |
| 43 | outb(0x00, 0x371); |
| 44 | |
| 45 | /* set a RED LED and toggle WD_TIMER for rebooting |
| 46 | */ |
| 47 | outb(0xc4, 0x338); |
| 48 | } else { |
| 49 | /* |
| 50 | * Force the watchdog to do a CPU reset. |
| 51 | * |
| 52 | * After making sure that the watchdog is disabled |
| 53 | * (so we can change the timer registers) we first |
| 54 | * enable the timer to autoreload itself. Next, the |
| 55 | * timer interval is set really short and any |
| 56 | * current interrupt request is cleared (so we can |
| 57 | * see an edge transition). Finally, TIMER4 is |
| 58 | * enabled as the watchdog. |
| 59 | */ |
| 60 | *CSR_SA110_CNTL &= ~(1 << 13); |
| 61 | *CSR_TIMER4_CNTL = TIMER_CNTL_ENABLE | |
| 62 | TIMER_CNTL_AUTORELOAD | |
| 63 | TIMER_CNTL_DIV16; |
| 64 | *CSR_TIMER4_LOAD = 0x2; |
| 65 | *CSR_TIMER4_CLR = 0; |
| 66 | *CSR_SA110_CNTL |= (1 << 13); |
| 67 | } |
| 68 | } |
| 69 | } |