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linux/arch/ppc/platforms/83xx/mpc834x_sys.c
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2 
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00

290 lines
7.1 KiB
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/*
* arch/ppc/platforms/83xx/mpc834x_sys.c
*
* MPC834x SYS board specific routines
*
* Maintainer: Kumar Gala <kumar.gala@freescale.com>
*
* Copyright 2005 Freescale Semiconductor Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/config.h>
#include <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/reboot.h>
#include <linux/pci.h>
#include <linux/kdev_t.h>
#include <linux/major.h>
#include <linux/console.h>
#include <linux/delay.h>
#include <linux/irq.h>
#include <linux/seq_file.h>
#include <linux/root_dev.h>
#include <linux/serial.h>
#include <linux/tty.h> /* for linux/serial_core.h */
#include <linux/serial_core.h>
#include <linux/initrd.h>
#include <linux/module.h>
#include <linux/fsl_devices.h>
#include <asm/system.h>
#include <asm/pgtable.h>
#include <asm/page.h>
#include <asm/atomic.h>
#include <asm/time.h>
#include <asm/io.h>
#include <asm/machdep.h>
#include <asm/prom.h>
#include <asm/ipic.h>
#include <asm/bootinfo.h>
#include <asm/pci-bridge.h>
#include <asm/mpc83xx.h>
#include <asm/irq.h>
#include <asm/kgdb.h>
#include <asm/ppc_sys.h>
#include <mm/mmu_decl.h>
#include <syslib/ppc83xx_setup.h>
#ifndef CONFIG_PCI
unsigned long isa_io_base = 0;
unsigned long isa_mem_base = 0;
#endif
extern unsigned long total_memory; /* in mm/init */
unsigned char __res[sizeof (bd_t)];
#ifdef CONFIG_PCI
#error "PCI is not supported"
/* NEED mpc83xx_map_irq & mpc83xx_exclude_device
see platforms/85xx/mpc85xx_ads_common.c */
#endif /* CONFIG_PCI */
/* ************************************************************************
*
* Setup the architecture
*
*/
static void __init
mpc834x_sys_setup_arch(void)
{
bd_t *binfo = (bd_t *) __res;
unsigned int freq;
struct gianfar_platform_data *pdata;
/* get the core frequency */
freq = binfo->bi_intfreq;
/* Set loops_per_jiffy to a half-way reasonable value,
for use until calibrate_delay gets called. */
loops_per_jiffy = freq / HZ;
#ifdef CONFIG_PCI
/* setup PCI host bridges */
mpc83xx_sys_setup_hose();
#endif
mpc83xx_early_serial_map();
/* setup the board related information for the enet controllers */
pdata = (struct gianfar_platform_data *) ppc_sys_get_pdata(MPC83xx_TSEC1);
pdata->board_flags = FSL_GIANFAR_BRD_HAS_PHY_INTR;
pdata->interruptPHY = MPC83xx_IRQ_EXT1;
pdata->phyid = 0;
/* fixup phy address */
pdata->phy_reg_addr += binfo->bi_immr_base;
memcpy(pdata->mac_addr, binfo->bi_enetaddr, 6);
pdata = (struct gianfar_platform_data *) ppc_sys_get_pdata(MPC83xx_TSEC2);
pdata->board_flags = FSL_GIANFAR_BRD_HAS_PHY_INTR;
pdata->interruptPHY = MPC83xx_IRQ_EXT2;
pdata->phyid = 1;
/* fixup phy address */
pdata->phy_reg_addr += binfo->bi_immr_base;
memcpy(pdata->mac_addr, binfo->bi_enet1addr, 6);
#ifdef CONFIG_BLK_DEV_INITRD
if (initrd_start)
ROOT_DEV = Root_RAM0;
else
#endif
#ifdef CONFIG_ROOT_NFS
ROOT_DEV = Root_NFS;
#else
ROOT_DEV = Root_HDA1;
#endif
}
static void __init
mpc834x_sys_map_io(void)
{
/* we steal the lowest ioremap addr for virt space */
io_block_mapping(VIRT_IMMRBAR, immrbar, 1024*1024, _PAGE_IO);
io_block_mapping(BCSR_VIRT_ADDR, BCSR_PHYS_ADDR, BCSR_SIZE, _PAGE_IO);
}
int
mpc834x_sys_show_cpuinfo(struct seq_file *m)
{
uint pvid, svid, phid1;
bd_t *binfo = (bd_t *) __res;
unsigned int freq;
/* get the core frequency */
freq = binfo->bi_intfreq;
pvid = mfspr(SPRN_PVR);
svid = mfspr(SPRN_SVR);
seq_printf(m, "Vendor\t\t: Freescale Inc.\n");
seq_printf(m, "Machine\t\t: mpc%s sys\n", cur_ppc_sys_spec->ppc_sys_name);
seq_printf(m, "core clock\t: %d MHz\n"
"bus clock\t: %d MHz\n",
(int)(binfo->bi_intfreq / 1000000),
(int)(binfo->bi_busfreq / 1000000));
seq_printf(m, "PVR\t\t: 0x%x\n", pvid);
seq_printf(m, "SVR\t\t: 0x%x\n", svid);
/* Display cpu Pll setting */
phid1 = mfspr(SPRN_HID1);
seq_printf(m, "PLL setting\t: 0x%x\n", ((phid1 >> 24) & 0x3f));
/* Display the amount of memory */
seq_printf(m, "Memory\t\t: %d MB\n", (int)(binfo->bi_memsize / (1024 * 1024)));
return 0;
}
void __init
mpc834x_sys_init_IRQ(void)
{
bd_t *binfo = (bd_t *) __res;
u8 senses[8] = {
0, /* EXT 0 */
IRQ_SENSE_LEVEL, /* EXT 1 */
IRQ_SENSE_LEVEL, /* EXT 2 */
0, /* EXT 3 */
0, /* EXT 4 */
0, /* EXT 5 */
0, /* EXT 6 */
0, /* EXT 7 */
};
ipic_init(binfo->bi_immr_base + 0x00700, 0, MPC83xx_IPIC_IRQ_OFFSET, senses, 8);
/* Initialize the default interrupt mapping priorities,
* in case the boot rom changed something on us.
*/
ipic_set_default_priority();
}
static __inline__ void
mpc834x_sys_set_bat(void)
{
/* we steal the lowest ioremap addr for virt space */
mb();
mtspr(SPRN_DBAT1U, VIRT_IMMRBAR | 0x1e);
mtspr(SPRN_DBAT1L, immrbar | 0x2a);
mb();
}
void __init
platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
unsigned long r6, unsigned long r7)
{
bd_t *binfo = (bd_t *) __res;
/* parse_bootinfo must always be called first */
parse_bootinfo(find_bootinfo());
/*
* If we were passed in a board information, copy it into the
* residual data area.
*/
if (r3) {
memcpy((void *) __res, (void *) (r3 + KERNELBASE),
sizeof (bd_t));
}
#if defined(CONFIG_BLK_DEV_INITRD)
/*
* If the init RAM disk has been configured in, and there's a valid
* starting address for it, set it up.
*/
if (r4) {
initrd_start = r4 + KERNELBASE;
initrd_end = r5 + KERNELBASE;
}
#endif /* CONFIG_BLK_DEV_INITRD */
/* Copy the kernel command line arguments to a safe place. */
if (r6) {
*(char *) (r7 + KERNELBASE) = 0;
strcpy(cmd_line, (char *) (r6 + KERNELBASE));
}
immrbar = binfo->bi_immr_base;
mpc834x_sys_set_bat();
#if defined(CONFIG_SERIAL_8250) && defined(CONFIG_SERIAL_TEXT_DEBUG)
{
struct uart_port p;
memset(&p, 0, sizeof (p));
p.iotype = SERIAL_IO_MEM;
p.membase = (unsigned char __iomem *)(VIRT_IMMRBAR + 0x4500);
p.uartclk = binfo->bi_busfreq;
gen550_init(0, &p);
memset(&p, 0, sizeof (p));
p.iotype = SERIAL_IO_MEM;
p.membase = (unsigned char __iomem *)(VIRT_IMMRBAR + 0x4600);
p.uartclk = binfo->bi_busfreq;
gen550_init(1, &p);
}
#endif
identify_ppc_sys_by_id(mfspr(SPRN_SVR));
/* setup the PowerPC module struct */
ppc_md.setup_arch = mpc834x_sys_setup_arch;
ppc_md.show_cpuinfo = mpc834x_sys_show_cpuinfo;
ppc_md.init_IRQ = mpc834x_sys_init_IRQ;
ppc_md.get_irq = ipic_get_irq;
ppc_md.restart = mpc83xx_restart;
ppc_md.power_off = mpc83xx_power_off;
ppc_md.halt = mpc83xx_halt;
ppc_md.find_end_of_memory = mpc83xx_find_end_of_memory;
ppc_md.setup_io_mappings = mpc834x_sys_map_io;
ppc_md.time_init = mpc83xx_time_init;
ppc_md.set_rtc_time = NULL;
ppc_md.get_rtc_time = NULL;
ppc_md.calibrate_decr = mpc83xx_calibrate_decr;
ppc_md.early_serial_map = mpc83xx_early_serial_map;
#if defined(CONFIG_SERIAL_8250) && defined(CONFIG_SERIAL_TEXT_DEBUG)
ppc_md.progress = gen550_progress;
#endif /* CONFIG_SERIAL_8250 && CONFIG_SERIAL_TEXT_DEBUG */
if (ppc_md.progress)
ppc_md.progress("mpc834x_sys_init(): exit", 0);
return;
}
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