x86/efi: Enforce CONFIG_RELOCATABLE for EFI boot stub
[linux/fpc-iii.git] / arch / arm / plat-samsung / init.c
blob50a3ea0037db10d2032e2ce020688b6fa74614b0
1 /* linux/arch/arm/plat-s3c/init.c
3 * Copyright (c) 2008 Simtec Electronics
4 * Ben Dooks <ben@simtec.co.uk>
5 * http://armlinux.simtec.co.uk/
7 * S3C series CPU initialisation
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/init.h>
15 #include <linux/module.h>
16 #include <linux/interrupt.h>
17 #include <linux/ioport.h>
18 #include <linux/serial_core.h>
19 #include <linux/platform_device.h>
21 #include <mach/hardware.h>
23 #include <asm/mach/arch.h>
24 #include <asm/mach/map.h>
26 #include <plat/cpu.h>
27 #include <plat/devs.h>
28 #include <plat/clock.h>
30 #include <plat/regs-serial.h>
32 static struct cpu_table *cpu;
34 static struct cpu_table * __init s3c_lookup_cpu(unsigned long idcode,
35 struct cpu_table *tab,
36 unsigned int count)
38 for (; count != 0; count--, tab++) {
39 if ((idcode & tab->idmask) == (tab->idcode & tab->idmask))
40 return tab;
43 return NULL;
46 void __init s3c_init_cpu(unsigned long idcode,
47 struct cpu_table *cputab, unsigned int cputab_size)
49 cpu = s3c_lookup_cpu(idcode, cputab, cputab_size);
51 if (cpu == NULL) {
52 printk(KERN_ERR "Unknown CPU type 0x%08lx\n", idcode);
53 panic("Unknown S3C24XX CPU");
56 printk("CPU %s (id 0x%08lx)\n", cpu->name, idcode);
58 if (cpu->init == NULL) {
59 printk(KERN_ERR "CPU %s support not enabled\n", cpu->name);
60 panic("Unsupported Samsung CPU");
63 if (cpu->map_io)
64 cpu->map_io();
67 /* s3c24xx_init_clocks
69 * Initialise the clock subsystem and associated information from the
70 * given master crystal value.
72 * xtal = 0 -> use default PLL crystal value (normally 12MHz)
73 * != 0 -> PLL crystal value in Hz
76 void __init s3c24xx_init_clocks(int xtal)
78 if (xtal == 0)
79 xtal = 12*1000*1000;
81 if (cpu == NULL)
82 panic("s3c24xx_init_clocks: no cpu setup?\n");
84 if (cpu->init_clocks == NULL)
85 panic("s3c24xx_init_clocks: cpu has no clock init\n");
86 else
87 (cpu->init_clocks)(xtal);
90 /* uart management */
91 #if IS_ENABLED(CONFIG_SAMSUNG_ATAGS)
92 static int nr_uarts __initdata = 0;
94 static struct s3c2410_uartcfg uart_cfgs[CONFIG_SERIAL_SAMSUNG_UARTS];
96 /* s3c24xx_init_uartdevs
98 * copy the specified platform data and configuration into our central
99 * set of devices, before the data is thrown away after the init process.
101 * This also fills in the array passed to the serial driver for the
102 * early initialisation of the console.
105 void __init s3c24xx_init_uartdevs(char *name,
106 struct s3c24xx_uart_resources *res,
107 struct s3c2410_uartcfg *cfg, int no)
109 struct platform_device *platdev;
110 struct s3c2410_uartcfg *cfgptr = uart_cfgs;
111 struct s3c24xx_uart_resources *resp;
112 int uart;
114 memcpy(cfgptr, cfg, sizeof(struct s3c2410_uartcfg) * no);
116 for (uart = 0; uart < no; uart++, cfg++, cfgptr++) {
117 platdev = s3c24xx_uart_src[cfgptr->hwport];
119 resp = res + cfgptr->hwport;
121 s3c24xx_uart_devs[uart] = platdev;
123 platdev->name = name;
124 platdev->resource = resp->resources;
125 platdev->num_resources = resp->nr_resources;
127 platdev->dev.platform_data = cfgptr;
130 nr_uarts = no;
133 void __init s3c24xx_init_uarts(struct s3c2410_uartcfg *cfg, int no)
135 if (cpu == NULL)
136 return;
138 if (cpu->init_uarts == NULL && IS_ENABLED(CONFIG_SAMSUNG_ATAGS)) {
139 printk(KERN_ERR "s3c24xx_init_uarts: cpu has no uart init\n");
140 } else
141 (cpu->init_uarts)(cfg, no);
143 #endif
145 static int __init s3c_arch_init(void)
147 int ret;
149 // do the correct init for cpu
151 if (cpu == NULL)
152 panic("s3c_arch_init: NULL cpu\n");
154 ret = (cpu->init)();
155 if (ret != 0)
156 return ret;
157 #if IS_ENABLED(CONFIG_SAMSUNG_ATAGS)
158 ret = platform_add_devices(s3c24xx_uart_devs, nr_uarts);
159 #endif
160 return ret;
163 arch_initcall(s3c_arch_init);