diff options
Diffstat (limited to 'arch/ppc/platforms/adir_setup.c')
| -rw-r--r-- | arch/ppc/platforms/adir_setup.c | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/arch/ppc/platforms/adir_setup.c b/arch/ppc/platforms/adir_setup.c new file mode 100644 index 00000000000..6a6754ee061 --- /dev/null +++ b/arch/ppc/platforms/adir_setup.c @@ -0,0 +1,210 @@ +/* + * arch/ppc/platforms/adir_setup.c + * + * Board setup routines for SBS Adirondack + * + * By Michael Sokolov <msokolov@ivan.Harhan.ORG> + * based on the K2 version by Matt Porter <mporter@mvista.com> + */ + +#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/types.h> +#include <linux/major.h> +#include <linux/initrd.h> +#include <linux/console.h> +#include <linux/delay.h> +#include <linux/ide.h> +#include <linux/seq_file.h> +#include <linux/root_dev.h> + +#include <asm/system.h> +#include <asm/pgtable.h> +#include <asm/page.h> +#include <asm/dma.h> +#include <asm/io.h> +#include <asm/machdep.h> +#include <asm/time.h> +#include <asm/todc.h> +#include <asm/bootinfo.h> + +#include "adir.h" + +extern void adir_init_IRQ(void); +extern int adir_get_irq(struct pt_regs *); +extern void adir_find_bridges(void); +extern unsigned long loops_per_jiffy; + +static unsigned int cpu_750cx[16] = { + 5, 15, 14, 0, 4, 13, 0, 9, 6, 11, 8, 10, 16, 12, 7, 0 +}; + +static int +adir_get_bus_speed(void) +{ + if (!(*((u_char *) ADIR_CLOCK_REG) & ADIR_CLOCK_REG_SEL133)) + return 100000000; + else + return 133333333; +} + +static int +adir_get_cpu_speed(void) +{ + unsigned long hid1; + int cpu_speed; + + hid1 = mfspr(SPRN_HID1) >> 28; + + hid1 = cpu_750cx[hid1]; + + cpu_speed = adir_get_bus_speed()*hid1/2; + return cpu_speed; +} + +static void __init +adir_calibrate_decr(void) +{ + int freq, divisor = 4; + + /* determine processor bus speed */ + freq = adir_get_bus_speed(); + tb_ticks_per_jiffy = freq / HZ / divisor; + tb_to_us = mulhwu_scale_factor(freq/divisor, 1000000); +} + +static int +adir_show_cpuinfo(struct seq_file *m) +{ + seq_printf(m, "vendor\t\t: SBS\n"); + seq_printf(m, "machine\t\t: Adirondack\n"); + seq_printf(m, "cpu speed\t: %dMhz\n", adir_get_cpu_speed()/1000000); + seq_printf(m, "bus speed\t: %dMhz\n", adir_get_bus_speed()/1000000); + seq_printf(m, "memory type\t: SDRAM\n"); + + return 0; +} + +extern char cmd_line[]; + +TODC_ALLOC(); + +static void __init +adir_setup_arch(void) +{ + unsigned int cpu; + + /* Setup TODC access */ + TODC_INIT(TODC_TYPE_MC146818, ADIR_NVRAM_RTC_ADDR, 0, + ADIR_NVRAM_RTC_DATA, 8); + + /* init to some ~sane value until calibrate_delay() runs */ + loops_per_jiffy = 50000000/HZ; + + /* Setup PCI host bridges */ + adir_find_bridges(); + +#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_SDA1; +#endif + + /* Identify the system */ + printk("System Identification: SBS Adirondack - PowerPC 750CXe @ %d Mhz\n", adir_get_cpu_speed()/1000000); + printk("SBS Adirondack port (C) 2001 SBS Technologies, Inc.\n"); + + /* Identify the CPU manufacturer */ + cpu = mfspr(SPRN_PVR); + printk("CPU manufacturer: IBM [rev=%04x]\n", (cpu & 0xffff)); +} + +static void +adir_restart(char *cmd) +{ + local_irq_disable(); + /* SRR0 has system reset vector, SRR1 has default MSR value */ + /* rfi restores MSR from SRR1 and sets the PC to the SRR0 value */ + __asm__ __volatile__ + ("lis 3,0xfff0\n\t" + "ori 3,3,0x0100\n\t" + "mtspr 26,3\n\t" + "li 3,0\n\t" + "mtspr 27,3\n\t" + "rfi\n\t"); + for(;;); +} + +static void +adir_power_off(void) +{ + for(;;); +} + +static void +adir_halt(void) +{ + adir_restart(NULL); +} + +static unsigned long __init +adir_find_end_of_memory(void) +{ + return boot_mem_size; +} + +static void __init +adir_map_io(void) +{ + io_block_mapping(ADIR_PCI32_VIRT_IO_BASE, ADIR_PCI32_IO_BASE, + ADIR_PCI32_VIRT_IO_SIZE, _PAGE_IO); + io_block_mapping(ADIR_PCI64_VIRT_IO_BASE, ADIR_PCI64_IO_BASE, + ADIR_PCI64_VIRT_IO_SIZE, _PAGE_IO); +} + +void __init +platform_init(unsigned long r3, unsigned long r4, unsigned long r5, + unsigned long r6, unsigned long r7) +{ + /* + * On the Adirondack we use bi_recs and pass the pointer to them in R3. + */ + parse_bootinfo((struct bi_record *) (r3 + KERNELBASE)); + + /* Remember, isa_io_base is virtual but isa_mem_base is physical! */ + isa_io_base = ADIR_PCI32_VIRT_IO_BASE; + isa_mem_base = ADIR_PCI32_MEM_BASE; + pci_dram_offset = ADIR_PCI_SYS_MEM_BASE; + + ppc_md.setup_arch = adir_setup_arch; + ppc_md.show_cpuinfo = adir_show_cpuinfo; + ppc_md.irq_canonicalize = NULL; + ppc_md.init_IRQ = adir_init_IRQ; + ppc_md.get_irq = adir_get_irq; + ppc_md.init = NULL; + + ppc_md.find_end_of_memory = adir_find_end_of_memory; + ppc_md.setup_io_mappings = adir_map_io; + + ppc_md.restart = adir_restart; + ppc_md.power_off = adir_power_off; + ppc_md.halt = adir_halt; + + ppc_md.time_init = todc_time_init; + ppc_md.set_rtc_time = todc_set_rtc_time; + ppc_md.get_rtc_time = todc_get_rtc_time; + ppc_md.nvram_read_val = todc_mc146818_read_val; + ppc_md.nvram_write_val = todc_mc146818_write_val; + ppc_md.calibrate_decr = adir_calibrate_decr; +} |