11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * linux/arch/arm/mach-footbridge/common.c 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Copyright (C) 1998-2000 Russell King, Dave Gilbert. 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * This program is free software; you can redistribute it and/or modify 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it under the terms of the GNU General Public License version 2 as 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * published by the Free Software Foundation. 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/module.h> 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/types.h> 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/mm.h> 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/ioport.h> 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/list.h> 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <linux/init.h> 16fced80c735941fa518ac67c0b61bbe153fb8c050Russell King#include <linux/io.h> 1770d13e083c8589dd3edc2313777655da39cb3568Russell King#include <linux/spinlock.h> 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/pgtable.h> 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/page.h> 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/irq.h> 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/mach-types.h> 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/setup.h> 249f97da78bf018206fb623cd351d454af2f105fe0David Howells#include <asm/system_misc.h> 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/hardware/dec21285.h> 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/mach/irq.h> 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include <asm/mach/map.h> 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#include "common.h" 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsunsigned int mem_fclk_21285 = 50000000; 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(mem_fclk_21285); 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 362b0d8c251b8876d530a6bf671eb5425838fa698aJeremy Kerrstatic int __init early_fclk(char *arg) 37613e09b46a86d454fb53f7e9eac5e240f1e3bacfRussell King{ 382b0d8c251b8876d530a6bf671eb5425838fa698aJeremy Kerr mem_fclk_21285 = simple_strtoul(arg, NULL, 0); 392b0d8c251b8876d530a6bf671eb5425838fa698aJeremy Kerr return 0; 40613e09b46a86d454fb53f7e9eac5e240f1e3bacfRussell King} 41613e09b46a86d454fb53f7e9eac5e240f1e3bacfRussell King 422b0d8c251b8876d530a6bf671eb5425838fa698aJeremy Kerrearly_param("mem_fclk_21285", early_fclk); 43613e09b46a86d454fb53f7e9eac5e240f1e3bacfRussell King 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic int __init parse_tag_memclk(const struct tag *tag) 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds mem_fclk_21285 = tag->u.memclk.fmemclk; 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return 0; 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds__tagtable(ATAG_MEMCLK, parse_tag_memclk); 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Footbridge IRQ translation table 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Converts from our IRQ numbers into FootBridge masks 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic const int fb_irq_mask[] = { 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds IRQ_MASK_UART_RX, /* 0 */ 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds IRQ_MASK_UART_TX, /* 1 */ 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds IRQ_MASK_TIMER1, /* 2 */ 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds IRQ_MASK_TIMER2, /* 3 */ 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds IRQ_MASK_TIMER3, /* 4 */ 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds IRQ_MASK_IN0, /* 5 */ 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds IRQ_MASK_IN1, /* 6 */ 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds IRQ_MASK_IN2, /* 7 */ 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds IRQ_MASK_IN3, /* 8 */ 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds IRQ_MASK_DOORBELLHOST, /* 9 */ 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds IRQ_MASK_DMA1, /* 10 */ 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds IRQ_MASK_DMA2, /* 11 */ 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds IRQ_MASK_PCI, /* 12 */ 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds IRQ_MASK_SDRAMPARITY, /* 13 */ 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds IRQ_MASK_I2OINPOST, /* 14 */ 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds IRQ_MASK_PCI_ABORT, /* 15 */ 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds IRQ_MASK_PCI_SERR, /* 16 */ 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds IRQ_MASK_DISCARD_TIMER, /* 17 */ 751da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds IRQ_MASK_PCI_DPERR, /* 18 */ 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds IRQ_MASK_PCI_PERR, /* 19 */ 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 79dc2caf6c691c30867fb9a725ab15f60f392c429aLennert Buytenhekstatic void fb_mask_irq(struct irq_data *d) 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 81dc2caf6c691c30867fb9a725ab15f60f392c429aLennert Buytenhek *CSR_IRQ_DISABLE = fb_irq_mask[_DC21285_INR(d->irq)]; 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 84dc2caf6c691c30867fb9a725ab15f60f392c429aLennert Buytenhekstatic void fb_unmask_irq(struct irq_data *d) 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 86dc2caf6c691c30867fb9a725ab15f60f392c429aLennert Buytenhek *CSR_IRQ_ENABLE = fb_irq_mask[_DC21285_INR(d->irq)]; 871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 8910dd5ce28d78e2440e8fa1135d17e33399d75340Russell Kingstatic struct irq_chip fb_chip = { 90dc2caf6c691c30867fb9a725ab15f60f392c429aLennert Buytenhek .irq_ack = fb_mask_irq, 91dc2caf6c691c30867fb9a725ab15f60f392c429aLennert Buytenhek .irq_mask = fb_mask_irq, 92dc2caf6c691c30867fb9a725ab15f60f392c429aLennert Buytenhek .irq_unmask = fb_unmask_irq, 931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic void __init __fb_init_irq(void) 961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned int irq; 981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 1001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * setup DC21285 IRQs 1011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *CSR_IRQ_DISABLE = -1; 1031da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds *CSR_FIQ_DISABLE = -1; 1041da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1051da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds for (irq = _DC21285_IRQ(0); irq < _DC21285_IRQ(20); irq++) { 106f38c02f3b338651e145aac2889ba976baf6b28b3Thomas Gleixner irq_set_chip_and_handler(irq, &fb_chip, handle_level_irq); 1071da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds set_irq_flags(irq, IRQF_VALID | IRQF_PROBE); 1081da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds } 1091da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid __init footbridge_init_irq(void) 1121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds __fb_init_irq(); 1141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (!footbridge_cfn_mode()) 1161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return; 1171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (machine_is_ebsa285()) 1191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* The following is dependent on which slot 1201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * you plug the Southbridge card into. We 1211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * currently assume that you plug it into 1221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * the right-hand most slot. 1231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds isa_init_irq(IRQ_PCI); 1251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (machine_is_cats()) 1271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds isa_init_irq(IRQ_IN2); 1281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (machine_is_netwinder()) 1301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds isa_init_irq(IRQ_IN3); 1311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 1321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 1341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Common mapping for all systems. Note that the outbound write flush is 1351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * commented out since there is a "No Fix" problem with it. Not mapping 1361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * it means that we have extra bullet protection on our feet. 1371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct map_desc fb_common_io_desc[] __initdata = { 139a427ceef934d8162c8c61d152e969bc3ec21a4e5Deepak Saxena { 140a427ceef934d8162c8c61d152e969bc3ec21a4e5Deepak Saxena .virtual = ARMCSR_BASE, 141865052fd51a4f95a9c61961198695877ddc3dc9eRussell King .pfn = __phys_to_pfn(DC21285_ARMCSR_BASE), 142a427ceef934d8162c8c61d152e969bc3ec21a4e5Deepak Saxena .length = ARMCSR_SIZE, 1436460177f42358a744e110cc583adbe8a36f6aa08Russell King .type = MT_DEVICE, 144a427ceef934d8162c8c61d152e969bc3ec21a4e5Deepak Saxena }, { 145a427ceef934d8162c8c61d152e969bc3ec21a4e5Deepak Saxena .virtual = XBUS_BASE, 146a427ceef934d8162c8c61d152e969bc3ec21a4e5Deepak Saxena .pfn = __phys_to_pfn(0x40000000), 147a427ceef934d8162c8c61d152e969bc3ec21a4e5Deepak Saxena .length = XBUS_SIZE, 1486460177f42358a744e110cc583adbe8a36f6aa08Russell King .type = MT_DEVICE, 149a427ceef934d8162c8c61d152e969bc3ec21a4e5Deepak Saxena } 1501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 1531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * The mapping when the footbridge is in host mode. We don't map any of 1541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * this when we are in add-in mode. 1551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstatic struct map_desc ebsa285_host_io_desc[] __initdata = { 1571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#if defined(CONFIG_ARCH_FOOTBRIDGE) && defined(CONFIG_FOOTBRIDGE_HOST) 158a427ceef934d8162c8c61d152e969bc3ec21a4e5Deepak Saxena { 159a427ceef934d8162c8c61d152e969bc3ec21a4e5Deepak Saxena .virtual = PCIMEM_BASE, 160a427ceef934d8162c8c61d152e969bc3ec21a4e5Deepak Saxena .pfn = __phys_to_pfn(DC21285_PCI_MEM), 161a427ceef934d8162c8c61d152e969bc3ec21a4e5Deepak Saxena .length = PCIMEM_SIZE, 1626460177f42358a744e110cc583adbe8a36f6aa08Russell King .type = MT_DEVICE, 163a427ceef934d8162c8c61d152e969bc3ec21a4e5Deepak Saxena }, { 164a427ceef934d8162c8c61d152e969bc3ec21a4e5Deepak Saxena .virtual = PCICFG0_BASE, 165a427ceef934d8162c8c61d152e969bc3ec21a4e5Deepak Saxena .pfn = __phys_to_pfn(DC21285_PCI_TYPE_0_CONFIG), 166a427ceef934d8162c8c61d152e969bc3ec21a4e5Deepak Saxena .length = PCICFG0_SIZE, 1676460177f42358a744e110cc583adbe8a36f6aa08Russell King .type = MT_DEVICE, 168a427ceef934d8162c8c61d152e969bc3ec21a4e5Deepak Saxena }, { 169a427ceef934d8162c8c61d152e969bc3ec21a4e5Deepak Saxena .virtual = PCICFG1_BASE, 170a427ceef934d8162c8c61d152e969bc3ec21a4e5Deepak Saxena .pfn = __phys_to_pfn(DC21285_PCI_TYPE_1_CONFIG), 171a427ceef934d8162c8c61d152e969bc3ec21a4e5Deepak Saxena .length = PCICFG1_SIZE, 1726460177f42358a744e110cc583adbe8a36f6aa08Russell King .type = MT_DEVICE, 173a427ceef934d8162c8c61d152e969bc3ec21a4e5Deepak Saxena }, { 174a427ceef934d8162c8c61d152e969bc3ec21a4e5Deepak Saxena .virtual = PCIIACK_BASE, 175a427ceef934d8162c8c61d152e969bc3ec21a4e5Deepak Saxena .pfn = __phys_to_pfn(DC21285_PCI_IACK), 176a427ceef934d8162c8c61d152e969bc3ec21a4e5Deepak Saxena .length = PCIIACK_SIZE, 1776460177f42358a744e110cc583adbe8a36f6aa08Russell King .type = MT_DEVICE, 178a427ceef934d8162c8c61d152e969bc3ec21a4e5Deepak Saxena }, { 179a427ceef934d8162c8c61d152e969bc3ec21a4e5Deepak Saxena .virtual = PCIO_BASE, 180a427ceef934d8162c8c61d152e969bc3ec21a4e5Deepak Saxena .pfn = __phys_to_pfn(DC21285_PCI_IO), 181a427ceef934d8162c8c61d152e969bc3ec21a4e5Deepak Saxena .length = PCIO_SIZE, 1826460177f42358a744e110cc583adbe8a36f6aa08Russell King .type = MT_DEVICE, 1836460177f42358a744e110cc583adbe8a36f6aa08Russell King }, 1841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 1851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 1861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1871da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsvoid __init footbridge_map_io(void) 1881da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 1891da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 1901da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Set up the common mapping first; we need this to 1911da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * determine whether we're in host mode or not. 1921da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1931da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds iotable_init(fb_common_io_desc, ARRAY_SIZE(fb_common_io_desc)); 1941da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 1951da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* 1961da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * Now, work out what we've got to map in addition on this 1971da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * platform. 1981da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 1991da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds if (footbridge_cfn_mode()) 2001da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds iotable_init(ebsa285_host_io_desc, ARRAY_SIZE(ebsa285_host_io_desc)); 2011da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2021da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2036fca1e17f64936de2e9c614c0d246e65ae553b68Russell Kingvoid footbridge_restart(char mode, const char *cmd) 2046fca1e17f64936de2e9c614c0d246e65ae553b68Russell King{ 2056fca1e17f64936de2e9c614c0d246e65ae553b68Russell King if (mode == 's') { 2066fca1e17f64936de2e9c614c0d246e65ae553b68Russell King /* Jump into the ROM */ 2076fca1e17f64936de2e9c614c0d246e65ae553b68Russell King soft_restart(0x41000000); 2086fca1e17f64936de2e9c614c0d246e65ae553b68Russell King } else { 2096fca1e17f64936de2e9c614c0d246e65ae553b68Russell King /* 2106fca1e17f64936de2e9c614c0d246e65ae553b68Russell King * Force the watchdog to do a CPU reset. 2116fca1e17f64936de2e9c614c0d246e65ae553b68Russell King * 2126fca1e17f64936de2e9c614c0d246e65ae553b68Russell King * After making sure that the watchdog is disabled 2136fca1e17f64936de2e9c614c0d246e65ae553b68Russell King * (so we can change the timer registers) we first 2146fca1e17f64936de2e9c614c0d246e65ae553b68Russell King * enable the timer to autoreload itself. Next, the 2156fca1e17f64936de2e9c614c0d246e65ae553b68Russell King * timer interval is set really short and any 2166fca1e17f64936de2e9c614c0d246e65ae553b68Russell King * current interrupt request is cleared (so we can 2176fca1e17f64936de2e9c614c0d246e65ae553b68Russell King * see an edge transition). Finally, TIMER4 is 2186fca1e17f64936de2e9c614c0d246e65ae553b68Russell King * enabled as the watchdog. 2196fca1e17f64936de2e9c614c0d246e65ae553b68Russell King */ 2206fca1e17f64936de2e9c614c0d246e65ae553b68Russell King *CSR_SA110_CNTL &= ~(1 << 13); 2216fca1e17f64936de2e9c614c0d246e65ae553b68Russell King *CSR_TIMER4_CNTL = TIMER_CNTL_ENABLE | 2226fca1e17f64936de2e9c614c0d246e65ae553b68Russell King TIMER_CNTL_AUTORELOAD | 2236fca1e17f64936de2e9c614c0d246e65ae553b68Russell King TIMER_CNTL_DIV16; 2246fca1e17f64936de2e9c614c0d246e65ae553b68Russell King *CSR_TIMER4_LOAD = 0x2; 2256fca1e17f64936de2e9c614c0d246e65ae553b68Russell King *CSR_TIMER4_CLR = 0; 2266fca1e17f64936de2e9c614c0d246e65ae553b68Russell King *CSR_SA110_CNTL |= (1 << 13); 2276fca1e17f64936de2e9c614c0d246e65ae553b68Russell King } 2286fca1e17f64936de2e9c614c0d246e65ae553b68Russell King} 2296fca1e17f64936de2e9c614c0d246e65ae553b68Russell King 2301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifdef CONFIG_FOOTBRIDGE_ADDIN 2311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 232c7baab5d1e97437a2fca63b71d467f193dbebb02Russell Kingstatic inline unsigned long fb_bus_sdram_offset(void) 233c7baab5d1e97437a2fca63b71d467f193dbebb02Russell King{ 234c7baab5d1e97437a2fca63b71d467f193dbebb02Russell King return *CSR_PCISDRAMBASE & 0xfffffff0; 235c7baab5d1e97437a2fca63b71d467f193dbebb02Russell King} 236c7baab5d1e97437a2fca63b71d467f193dbebb02Russell King 2371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* 2381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * These two functions convert virtual addresses to PCI addresses and PCI 2391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * addresses to virtual addresses. Note that it is only legal to use these 2401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds * on memory obtained via get_zeroed_page or kmalloc. 2411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds */ 2421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsunsigned long __virt_to_bus(unsigned long res) 2431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 2441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds WARN_ON(res < PAGE_OFFSET || res >= (unsigned long)high_memory); 2451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 246c7baab5d1e97437a2fca63b71d467f193dbebb02Russell King return res + (fb_bus_sdram_offset() - PAGE_OFFSET); 2471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(__virt_to_bus); 2491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsunsigned long __bus_to_virt(unsigned long res) 2511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds{ 252c7baab5d1e97437a2fca63b71d467f193dbebb02Russell King res = res - (fb_bus_sdram_offset() - PAGE_OFFSET); 2531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds WARN_ON(res < PAGE_OFFSET || res >= (unsigned long)high_memory); 2551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 2561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds return res; 2571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds} 2581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus TorvaldsEXPORT_SYMBOL(__bus_to_virt); 2591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 260c7baab5d1e97437a2fca63b71d467f193dbebb02Russell Kingunsigned long __pfn_to_bus(unsigned long pfn) 261c7baab5d1e97437a2fca63b71d467f193dbebb02Russell King{ 26264dd3b74de7aaa5a7a7dc2a5904a063899ee81cbwanzongshun return __pfn_to_phys(pfn) + (fb_bus_sdram_offset() - PHYS_OFFSET); 263c7baab5d1e97437a2fca63b71d467f193dbebb02Russell King} 264c7baab5d1e97437a2fca63b71d467f193dbebb02Russell KingEXPORT_SYMBOL(__pfn_to_bus); 265c7baab5d1e97437a2fca63b71d467f193dbebb02Russell King 266c7baab5d1e97437a2fca63b71d467f193dbebb02Russell Kingunsigned long __bus_to_pfn(unsigned long bus) 267c7baab5d1e97437a2fca63b71d467f193dbebb02Russell King{ 268c7baab5d1e97437a2fca63b71d467f193dbebb02Russell King return __phys_to_pfn(bus - (fb_bus_sdram_offset() - PHYS_OFFSET)); 269c7baab5d1e97437a2fca63b71d467f193dbebb02Russell King} 270c7baab5d1e97437a2fca63b71d467f193dbebb02Russell KingEXPORT_SYMBOL(__bus_to_pfn); 271c7baab5d1e97437a2fca63b71d467f193dbebb02Russell King 2721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 273