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