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linux/arch/powerpc/platforms/cell/setup.c
Arnd Bergmann c902be71dc [PATCH] cell: enable pause(0) in cpu_idle
This patch enables support for pause(0) power management state
for the Cell Broadband Processor, which is import for power efficient
operation. The pervasive infrastructure will in the future enable
us to introduce more functionality specific to the Cell's
pervasive unit.

From: Maximino Aguilar <maguilar@us.ibm.com>
Signed-off-by: Arnd Bergmann <arndb@de.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-09 15:44:32 +11:00

235 lines
5.5 KiB
C

/*
* linux/arch/powerpc/platforms/cell/cell_setup.c
*
* Copyright (C) 1995 Linus Torvalds
* Adapted from 'alpha' version by Gary Thomas
* Modified by Cort Dougan (cort@cs.nmt.edu)
* Modified by PPC64 Team, IBM Corp
* Modified by Cell Team, IBM Deutschland Entwicklung GmbH
*
* 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.
*/
#undef DEBUG
#include <linux/config.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/stddef.h>
#include <linux/unistd.h>
#include <linux/slab.h>
#include <linux/user.h>
#include <linux/reboot.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/irq.h>
#include <linux/seq_file.h>
#include <linux/root_dev.h>
#include <linux/console.h>
#include <asm/mmu.h>
#include <asm/processor.h>
#include <asm/io.h>
#include <asm/kexec.h>
#include <asm/pgtable.h>
#include <asm/prom.h>
#include <asm/rtas.h>
#include <asm/pci-bridge.h>
#include <asm/iommu.h>
#include <asm/dma.h>
#include <asm/machdep.h>
#include <asm/time.h>
#include <asm/nvram.h>
#include <asm/cputable.h>
#include <asm/ppc-pci.h>
#include <asm/irq.h>
#include "interrupt.h"
#include "iommu.h"
#include "pervasive.h"
#ifdef DEBUG
#define DBG(fmt...) udbg_printf(fmt)
#else
#define DBG(fmt...)
#endif
void cell_show_cpuinfo(struct seq_file *m)
{
struct device_node *root;
const char *model = "";
root = of_find_node_by_path("/");
if (root)
model = get_property(root, "model", NULL);
seq_printf(m, "machine\t\t: CHRP %s\n", model);
of_node_put(root);
}
#ifdef CONFIG_SPARSEMEM
static int __init find_spu_node_id(struct device_node *spe)
{
unsigned int *id;
#ifdef CONFIG_NUMA
struct device_node *cpu;
cpu = spe->parent->parent;
id = (unsigned int *)get_property(cpu, "node-id", NULL);
#else
id = NULL;
#endif
return id ? *id : 0;
}
static void __init cell_spuprop_present(struct device_node *spe,
const char *prop, int early)
{
struct address_prop {
unsigned long address;
unsigned int len;
} __attribute__((packed)) *p;
int proplen;
unsigned long start_pfn, end_pfn, pfn;
int node_id;
p = (void*)get_property(spe, prop, &proplen);
WARN_ON(proplen != sizeof (*p));
node_id = find_spu_node_id(spe);
start_pfn = p->address >> PAGE_SHIFT;
end_pfn = (p->address + p->len + PAGE_SIZE - 1) >> PAGE_SHIFT;
/* We need to call memory_present *before* the call to sparse_init,
but we can initialize the page structs only *after* that call.
Thus, we're being called twice. */
if (early)
memory_present(node_id, start_pfn, end_pfn);
else {
/* As the pages backing SPU LS and I/O are outside the range
of regular memory, their page structs were not initialized
by free_area_init. Do it here instead. */
for (pfn = start_pfn; pfn < end_pfn; pfn++) {
struct page *page = pfn_to_page(pfn);
set_page_links(page, ZONE_DMA, node_id, pfn);
set_page_count(page, 1);
reset_page_mapcount(page);
SetPageReserved(page);
INIT_LIST_HEAD(&page->lru);
}
}
}
static void __init cell_spumem_init(int early)
{
struct device_node *node;
for (node = of_find_node_by_type(NULL, "spe");
node; node = of_find_node_by_type(node, "spe")) {
cell_spuprop_present(node, "local-store", early);
cell_spuprop_present(node, "problem", early);
cell_spuprop_present(node, "priv1", early);
cell_spuprop_present(node, "priv2", early);
}
}
#else
static void __init cell_spumem_init(int early)
{
}
#endif
static void cell_progress(char *s, unsigned short hex)
{
printk("*** %04x : %s\n", hex, s ? s : "");
}
static void __init cell_setup_arch(void)
{
ppc_md.init_IRQ = iic_init_IRQ;
ppc_md.get_irq = iic_get_irq;
#ifdef CONFIG_SMP
smp_init_cell();
#endif
/* init to some ~sane value until calibrate_delay() runs */
loops_per_jiffy = 50000000;
if (ROOT_DEV == 0) {
printk("No ramdisk, default root is /dev/hda2\n");
ROOT_DEV = Root_HDA2;
}
/* Find and initialize PCI host bridges */
init_pci_config_tokens();
find_and_init_phbs();
spider_init_IRQ();
cell_pervasive_init();
#ifdef CONFIG_DUMMY_CONSOLE
conswitchp = &dummy_con;
#endif
mmio_nvram_init();
cell_spumem_init(0);
}
/*
* Early initialization. Relocation is on but do not reference unbolted pages
*/
static void __init cell_init_early(void)
{
DBG(" -> cell_init_early()\n");
hpte_init_native();
cell_init_iommu();
ppc64_interrupt_controller = IC_CELL_PIC;
cell_spumem_init(1);
DBG(" <- cell_init_early()\n");
}
static int __init cell_probe(int platform)
{
if (platform != PLATFORM_CELL)
return 0;
return 1;
}
/*
* Cell has no legacy IO; anything calling this function has to
* fail or bad things will happen
*/
static int cell_check_legacy_ioport(unsigned int baseport)
{
return -ENODEV;
}
struct machdep_calls __initdata cell_md = {
.probe = cell_probe,
.setup_arch = cell_setup_arch,
.init_early = cell_init_early,
.show_cpuinfo = cell_show_cpuinfo,
.restart = rtas_restart,
.power_off = rtas_power_off,
.halt = rtas_halt,
.get_boot_time = rtas_get_boot_time,
.get_rtc_time = rtas_get_rtc_time,
.set_rtc_time = rtas_set_rtc_time,
.calibrate_decr = generic_calibrate_decr,
.check_legacy_ioport = cell_check_legacy_ioport,
.progress = cell_progress,
#ifdef CONFIG_KEXEC
.machine_kexec = default_machine_kexec,
.machine_kexec_prepare = default_machine_kexec_prepare,
.machine_crash_shutdown = default_machine_crash_shutdown,
#endif
};