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Diffstat (limited to 'arch/ppc64/kernel/maple_setup.c')
| -rw-r--r-- | arch/ppc64/kernel/maple_setup.c | 240 |
1 files changed, 240 insertions, 0 deletions
diff --git a/arch/ppc64/kernel/maple_setup.c b/arch/ppc64/kernel/maple_setup.c new file mode 100644 index 000000000000..1db6ea0f336f --- /dev/null +++ b/arch/ppc64/kernel/maple_setup.c @@ -0,0 +1,240 @@ +/* + * arch/ppc64/kernel/maple_setup.c + * + * (c) Copyright 2004 Benjamin Herrenschmidt (benh@kernel.crashing.org), + * IBM Corp. + * + * 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. + * + */ + +#define DEBUG + +#include <linux/config.h> +#include <linux/init.h> +#include <linux/errno.h> +#include <linux/sched.h> +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/stddef.h> +#include <linux/unistd.h> +#include <linux/ptrace.h> +#include <linux/slab.h> +#include <linux/user.h> +#include <linux/a.out.h> +#include <linux/tty.h> +#include <linux/string.h> +#include <linux/delay.h> +#include <linux/ioport.h> +#include <linux/major.h> +#include <linux/initrd.h> +#include <linux/vt_kern.h> +#include <linux/console.h> +#include <linux/ide.h> +#include <linux/pci.h> +#include <linux/adb.h> +#include <linux/cuda.h> +#include <linux/pmu.h> +#include <linux/irq.h> +#include <linux/seq_file.h> +#include <linux/root_dev.h> +#include <linux/serial.h> +#include <linux/smp.h> + +#include <asm/processor.h> +#include <asm/sections.h> +#include <asm/prom.h> +#include <asm/system.h> +#include <asm/pgtable.h> +#include <asm/bitops.h> +#include <asm/io.h> +#include <asm/pci-bridge.h> +#include <asm/iommu.h> +#include <asm/machdep.h> +#include <asm/dma.h> +#include <asm/cputable.h> +#include <asm/time.h> +#include <asm/of_device.h> +#include <asm/lmb.h> + +#include "mpic.h" + +#ifdef DEBUG +#define DBG(fmt...) udbg_printf(fmt) +#else +#define DBG(fmt...) +#endif + +extern int maple_set_rtc_time(struct rtc_time *tm); +extern void maple_get_rtc_time(struct rtc_time *tm); +extern void maple_get_boot_time(struct rtc_time *tm); +extern void maple_calibrate_decr(void); +extern void maple_pci_init(void); +extern void maple_pcibios_fixup(void); +extern int maple_pci_get_legacy_ide_irq(struct pci_dev *dev, int channel); +extern void generic_find_legacy_serial_ports(u64 *physport, + unsigned int *default_speed); + + +static void maple_restart(char *cmd) +{ +} + +static void maple_power_off(void) +{ +} + +static void maple_halt(void) +{ +} + +#ifdef CONFIG_SMP +struct smp_ops_t maple_smp_ops = { + .probe = smp_mpic_probe, + .message_pass = smp_mpic_message_pass, + .kick_cpu = smp_generic_kick_cpu, + .setup_cpu = smp_mpic_setup_cpu, + .give_timebase = smp_generic_give_timebase, + .take_timebase = smp_generic_take_timebase, +}; +#endif /* CONFIG_SMP */ + +void __init maple_setup_arch(void) +{ + /* init to some ~sane value until calibrate_delay() runs */ + loops_per_jiffy = 50000000; + + /* Setup SMP callback */ +#ifdef CONFIG_SMP + smp_ops = &maple_smp_ops; +#endif + /* Lookup PCI hosts */ + maple_pci_init(); + +#ifdef CONFIG_DUMMY_CONSOLE + conswitchp = &dummy_con; +#endif +} + +/* + * Early initialization. + */ +static void __init maple_init_early(void) +{ + unsigned int default_speed; + u64 physport; + + DBG(" -> maple_init_early\n"); + + /* Initialize hash table, from now on, we can take hash faults + * and call ioremap + */ + hpte_init_native(); + + /* Find the serial port */ + generic_find_legacy_serial_ports(&physport, &default_speed); + + DBG("phys port addr: %lx\n", (long)physport); + + if (physport) { + void *comport; + /* Map the uart for udbg. */ + comport = (void *)__ioremap(physport, 16, _PAGE_NO_CACHE); + udbg_init_uart(comport, default_speed); + + ppc_md.udbg_putc = udbg_putc; + ppc_md.udbg_getc = udbg_getc; + ppc_md.udbg_getc_poll = udbg_getc_poll; + DBG("Hello World !\n"); + } + + /* Setup interrupt mapping options */ + ppc64_interrupt_controller = IC_OPEN_PIC; + + iommu_init_early_u3(); + + DBG(" <- maple_init_early\n"); +} + + +static __init void maple_init_IRQ(void) +{ + struct device_node *root; + unsigned int *opprop; + unsigned long opic_addr; + struct mpic *mpic; + unsigned char senses[128]; + int n; + + DBG(" -> maple_init_IRQ\n"); + + /* XXX: Non standard, replace that with a proper openpic/mpic node + * in the device-tree. Find the Open PIC if present */ + root = of_find_node_by_path("/"); + opprop = (unsigned int *) get_property(root, + "platform-open-pic", NULL); + if (opprop == 0) + panic("OpenPIC not found !\n"); + + n = prom_n_addr_cells(root); + for (opic_addr = 0; n > 0; --n) + opic_addr = (opic_addr << 32) + *opprop++; + of_node_put(root); + + /* Obtain sense values from device-tree */ + prom_get_irq_senses(senses, 0, 128); + + mpic = mpic_alloc(opic_addr, + MPIC_PRIMARY | MPIC_BIG_ENDIAN | + MPIC_BROKEN_U3 | MPIC_WANTS_RESET, + 0, 0, 128, 128, senses, 128, "U3-MPIC"); + BUG_ON(mpic == NULL); + mpic_init(mpic); + + DBG(" <- maple_init_IRQ\n"); +} + +static void __init maple_progress(char *s, unsigned short hex) +{ + printk("*** %04x : %s\n", hex, s ? s : ""); +} + + +/* + * Called very early, MMU is off, device-tree isn't unflattened + */ +static int __init maple_probe(int platform) +{ + if (platform != PLATFORM_MAPLE) + return 0; + /* + * On U3, the DART (iommu) must be allocated now since it + * has an impact on htab_initialize (due to the large page it + * occupies having to be broken up so the DART itself is not + * part of the cacheable linar mapping + */ + alloc_u3_dart_table(); + + return 1; +} + +struct machdep_calls __initdata maple_md = { + .probe = maple_probe, + .setup_arch = maple_setup_arch, + .init_early = maple_init_early, + .init_IRQ = maple_init_IRQ, + .get_irq = mpic_get_irq, + .pcibios_fixup = maple_pcibios_fixup, + .pci_get_legacy_ide_irq = maple_pci_get_legacy_ide_irq, + .restart = maple_restart, + .power_off = maple_power_off, + .halt = maple_halt, + .get_boot_time = maple_get_boot_time, + .set_rtc_time = maple_set_rtc_time, + .get_rtc_time = maple_get_rtc_time, + .calibrate_decr = maple_calibrate_decr, + .progress = maple_progress, +}; |