1/* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * arch/sh64/mach-sim/setup.c 7 * 8 * ST50 Simulator Platform Support 9 * 10 * This file handles the architecture-dependent parts of initialization 11 * 12 * Copyright (C) 2000, 2001 Paolo Alberelli 13 * 14 * lethal@linux-sh.org: 15th May 2003 15 * Use the generic procfs cpuinfo interface, just return a valid board name. 16 */ 17 18#include <linux/stddef.h> 19#include <linux/init.h> 20#include <linux/mm.h> 21#include <linux/bootmem.h> 22#include <linux/delay.h> 23#include <linux/kernel.h> 24#include <asm/addrspace.h> 25#include <asm/processor.h> 26#include <asm/platform.h> 27#include <asm/io.h> 28#include <asm/irq.h> 29#include <asm/page.h> 30 31#ifdef CONFIG_BLK_DEV_INITRD 32#include "../rootfs/rootfs.h" 33#endif 34 35static __init void platform_monitor(void); 36static __init void platform_setup(void); 37static __init void platform_reserve(void); 38 39 40#define PHYS_MEMORY CONFIG_MEMORY_SIZE_IN_MB*1024*1024 41 42#if (PHYS_MEMORY < P1SEG_FOOTPRINT_RAM) 43#error "Invalid kernel configuration. Physical memory below footprint requirements." 44#endif 45 46#define RAM_DISK_START CONFIG_MEMORY_START+P1SEG_INITRD_BLOCK /* Top of 4MB */ 47#ifdef PLATFORM_ROMFS_SIZE 48#define RAM_DISK_SIZE (PAGE_ALIGN(PLATFORM_ROMFS_SIZE)) /* Variable Top */ 49#if ((RAM_DISK_START + RAM_DISK_SIZE) > (CONFIG_MEMORY_START + PHYS_MEMORY)) 50#error "Invalid kernel configuration. ROM RootFS exceeding physical memory." 51#endif 52#else 53#define RAM_DISK_SIZE P1SEG_INITRD_BLOCK_SIZE /* Top of 4MB */ 54#endif 55 56#define RES_COUNT(res) ((sizeof((res))/sizeof(struct resource))) 57 58/* 59 * Platform Dependent Interrupt Priorities. 60 */ 61 62/* Using defaults defined in irq.h */ 63#define RES NO_PRIORITY /* Disabled */ 64#define IR0 IRL0_PRIORITY /* IRLs */ 65#define IR1 IRL1_PRIORITY 66#define IR2 IRL2_PRIORITY 67#define IR3 IRL3_PRIORITY 68#define PCA INTA_PRIORITY /* PCI Ints */ 69#define PCB INTB_PRIORITY 70#define PCC INTC_PRIORITY 71#define PCD INTD_PRIORITY 72#define SER TOP_PRIORITY 73#define ERR TOP_PRIORITY 74#define PW0 TOP_PRIORITY 75#define PW1 TOP_PRIORITY 76#define PW2 TOP_PRIORITY 77#define PW3 TOP_PRIORITY 78#define DM0 NO_PRIORITY /* DMA Ints */ 79#define DM1 NO_PRIORITY 80#define DM2 NO_PRIORITY 81#define DM3 NO_PRIORITY 82#define DAE NO_PRIORITY 83#define TU0 TIMER_PRIORITY /* TMU Ints */ 84#define TU1 NO_PRIORITY 85#define TU2 NO_PRIORITY 86#define TI2 NO_PRIORITY 87#define ATI NO_PRIORITY /* RTC Ints */ 88#define PRI NO_PRIORITY 89#define CUI RTC_PRIORITY 90#define ERI SCIF_PRIORITY /* SCIF Ints */ 91#define RXI SCIF_PRIORITY 92#define BRI SCIF_PRIORITY 93#define TXI SCIF_PRIORITY 94#define ITI TOP_PRIORITY /* WDT Ints */ 95 96/* 97 * Platform dependent structures: maps and parms block. 98 */ 99struct resource io_resources[] = { 100 /* Nothing yet .. */ 101}; 102 103struct resource kram_resources[] = { 104 { "Kernel code", 0, 0 }, /* These must be last in the array */ 105 { "Kernel data", 0, 0 } /* These must be last in the array */ 106}; 107 108struct resource xram_resources[] = { 109 /* Nothing yet .. */ 110}; 111 112struct resource rom_resources[] = { 113 /* Nothing yet .. */ 114}; 115 116struct sh64_platform platform_parms = { 117 .readonly_rootfs = 1, 118 .initial_root_dev = 0x0100, 119 .loader_type = 1, 120 .initrd_start = RAM_DISK_START, 121 .initrd_size = RAM_DISK_SIZE, 122 .io_res_p = io_resources, 123 .io_res_count = RES_COUNT(io_resources), 124 .kram_res_p = kram_resources, 125 .kram_res_count = RES_COUNT(kram_resources), 126 .xram_res_p = xram_resources, 127 .xram_res_count = RES_COUNT(xram_resources), 128 .rom_res_p = rom_resources, 129 .rom_res_count = RES_COUNT(rom_resources), 130}; 131 132int platform_int_priority[NR_IRQS] = { 133 IR0, IR1, IR2, IR3, PCA, PCB, PCC, PCD, /* IRQ 0- 7 */ 134 RES, RES, RES, RES, SER, ERR, PW3, PW2, /* IRQ 8-15 */ 135 PW1, PW0, DM0, DM1, DM2, DM3, DAE, RES, /* IRQ 16-23 */ 136 RES, RES, RES, RES, RES, RES, RES, RES, /* IRQ 24-31 */ 137 TU0, TU1, TU2, TI2, ATI, PRI, CUI, ERI, /* IRQ 32-39 */ 138 RXI, BRI, TXI, RES, RES, RES, RES, RES, /* IRQ 40-47 */ 139 RES, RES, RES, RES, RES, RES, RES, RES, /* IRQ 48-55 */ 140 RES, RES, RES, RES, RES, RES, RES, ITI, /* IRQ 56-63 */ 141}; 142 143void __init platform_setup(void) 144{ 145 /* Simulator platform leaves the decision to head.S */ 146 platform_parms.fpu_flags = fpu_in_use; 147} 148 149void __init platform_monitor(void) 150{ 151 /* Nothing yet .. */ 152} 153 154void __init platform_reserve(void) 155{ 156 /* Nothing yet .. */ 157} 158 159const char *get_system_type(void) 160{ 161 return "SH-5 Simulator"; 162} 163