/*
* Unmaintained SGI Visual Workstation support.
* Split out from setup.c by davej@suse.de
*/
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/smp.h>
#include <asm/visws/cobalt.h>
#include <asm/visws/piix4.h>
#include <asm/arch_hooks.h>
#include <asm/fixmap.h>
#include <asm/reboot.h>
#include <asm/setup.h>
#include <asm/e820.h>
#include <asm/smp.h>
#include <asm/io.h>
#include <mach_ipi.h>
#include "mach_apic.h"
#include <linux/init.h>
#include <linux/smp.h>
char visws_board_type = -1;
char visws_board_rev = -1;
int is_visws_box(void)
{
return visws_board_type >= 0;
}
static int __init visws_time_init_quirk(void)
{
printk(KERN_INFO "Starting Cobalt Timer system clock\n");
/* Set the countdown value */
co_cpu_write(CO_CPU_TIMEVAL, CO_TIME_HZ/HZ);
/* Start the timer */
co_cpu_write(CO_CPU_CTRL, co_cpu_read(CO_CPU_CTRL) | CO_CTRL_TIMERUN);
/* Enable (unmask) the timer interrupt */
co_cpu_write(CO_CPU_CTRL, co_cpu_read(CO_CPU_CTRL) & ~CO_CTRL_TIMEMASK);
/*
* Zero return means the generic timer setup code will set up
* the standard vector:
*/
return 0;
}
static int __init visws_pre_intr_init_quirk(void)
{
init_VISWS_APIC_irqs();
/*
* We dont want ISA irqs to be set up by the generic code:
*/
return 1;
}
/* Quirk for machine specific memory setup. */
#define MB (1024 * 1024)
unsigned long sgivwfb_mem_phys;
unsigned long sgivwfb_mem_size;
EXPORT_SYMBOL(sgivwfb_mem_phys);
EXPORT_SYMBOL(sgivwfb_mem_size);
long long mem_size __initdata = 0;
static char * __init visws_memory_setup_quirk(void)
{
long long gfx_mem_size = 8 * MB;
mem_size = boot_params.alt_mem_k;
if (!mem_size) {
printk(KERN_WARNING "Bootloader didn't set memory size, upgrade it !\n");
mem_size = 128 * MB;
}
/*
* this hardcodes the graphics memory to 8 MB
* it really should be sized dynamically (or at least
* set as a boot param)
*/
if (!sgivwfb_mem_size) {
printk(KERN_WARNING "Defaulting to 8 MB framebuffer size\n");
sgivwfb_mem_size = 8 * MB;
}
/*
* Trim to nearest MB
*/
sgivwfb_mem_size &= ~((1 << 20) - 1);
sgivwfb_mem_phys = mem_size - gfx_mem_size;
e820_add_region(0, LOWMEMSIZE(), E820_RAM);
e820_add_region(HIGH_MEMORY, mem_size - sgivwfb_mem_size - HIGH_MEMORY, E820_RAM);
e820_add_region(sgivwfb_mem_phys, sgivwfb_mem_size, E820_RESERVED);
return "PROM";
}
static void visws_machine_emergency_restart(void)
{
/*
* Visual Workstations restart after this
* register is poked on the PIIX4
*/
outb(PIIX4_RESET_VAL, PIIX4_RESET_PORT);
}
static void visws_machine_power_off(void)
{
unsigned short pm_status;
/* extern unsigned int pci_bus0; */
while ((pm_status = inw(PMSTS_PORT)) & 0x100)
outw(pm_status, PMSTS_PORT);
outw(PM_SUSPEND_ENABLE, PMCNTRL_PORT);
mdelay(10);
#define PCI_CONF1_ADDRESS(bus, devfn, reg) \
(0x80000000 | (bus << 16) | (devfn << 8) | (reg & ~3))
/* outl(PCI_CONF1_ADDRESS(pci_bus0, SPECIAL_DEV, SPECIAL_REG), 0xCF8); */
outl(PIIX_SPECIAL_STOP, 0xCFC);
}
static int __init visws_get_smp_config_quirk(unsigned int early)
{
/*
* Prevent MP-table parsing by the generic code:
*/
return 1;
}
extern unsigned int __cpuinitdata maxcpus;
/*
* The Visual Workstation is Intel MP compliant in the hardware
* sense, but it doesn't have a BIOS(-configuration table).
* No problem for Linux.
*/
static void __init MP_processor_info (struct mpc_config_processor *m)
{
int ver, logical_apicid;
physid_mask_t apic_cpus;
if (!(m->mpc_cpuflag & CPU_ENABLED))
return;
logical_apicid = m->mpc_apicid;
printk(KERN_INFO "%sCPU #%d %u:%u APIC version %d\n",
m->mpc_cpuflag & CPU_BOOTPROCESSOR ? "Bootup " : "",
m->mpc_apicid,
(m->mpc_cpufeature & CPU_FAMILY_MASK) >> 8,
(m->mpc_cpufeature & CPU_MODEL_MASK) >> 4,
m->mpc_apicver);
if (m->mpc_cpuflag & CPU_BOOTPROCESSOR)
boot_cpu_physical_apicid = m->mpc_apicid;
ver = m->mpc_apicver;
if ((ver >= 0x14 && m->mpc_apicid >= 0xff) || m->mpc_apicid >= 0xf) {
printk(KERN_ERR "Processor #%d INVALID. (Max ID: %d).\n",
m->mpc_apicid, MAX_APICS);
return;
}
apic_cpus = apicid_to_cpu_present(m->mpc_apicid);
physids_or(phys_cpu_present_map, phys_cpu_present_map, apic_cpus);
/*
* Validate version
*/
if (ver == 0x0) {
printk(KERN_ERR "BIOS bug, APIC version is 0 for CPU#%d! "
"fixing up to 0x10. (tell your hw vendor)\n",
m->mpc_apicid);
ver = 0x10;
}
apic_version[m->mpc_apicid] = ver;
}
int __init visws_find_smp_config_quirk(unsigned int reserve)
{
struct mpc_config_processor *mp = phys_to_virt(CO_CPU_TAB_PHYS);
unsigned short ncpus = readw(phys_to_virt(CO_CPU_NUM_PHYS));
if (ncpus > CO_CPU_MAX) {
printk(KERN_WARNING "find_visws_smp: got cpu count of %d at %p\n",
ncpus, mp);
ncpus = CO_CPU_MAX;
}
if (ncpus > maxcpus)
ncpus = maxcpus;
#ifdef CONFIG_X86_LOCAL_APIC
smp_found_config = 1;
#endif
while (ncpus--)
MP_processor_info(mp++);
mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
return 1;
}
extern int visws_trap_init_quirk(void);
void __init visws_early_detect(void)
{
int raw;
visws_board_type = (char)(inb_p(PIIX_GPI_BD_REG) & PIIX_GPI_BD_REG)
>> PIIX_GPI_BD_SHIFT;
if (visws_board_type < 0)
return;
/*
* Install special quirks for timer, interrupt and memory setup:
*/
arch_time_init_quirk = visws_time_init_quirk;
arch_pre_intr_init_quirk = visws_pre_intr_init_quirk;
arch_memory_setup_quirk = visws_memory_setup_quirk;
/*
* Fall back to generic behavior for traps:
*/
arch_intr_init_quirk = NULL;
arch_trap_init_quirk = visws_trap_init_quirk;
/*
* Install reboot quirks:
*/
pm_power_off = visws_machine_power_off;
machine_ops.emergency_restart = visws_machine_emergency_restart;
/*
* Do not use broadcast IPIs:
*/
no_broadcast = 0;
/*
* Override generic MP-table parsing:
*/
mach_get_smp_config_quirk = visws_get_smp_config_quirk;
mach_find_smp_config_quirk = visws_find_smp_config_quirk;
#ifdef CONFIG_X86_IO_APIC
/*
* Turn off IO-APIC detection and initialization:
*/
skip_ioapic_setup = 1;
#endif
/*
* Get Board rev.
* First, we have to initialize the 307 part to allow us access
* to the GPIO registers. Let's map them at 0x0fc0 which is right
* after the PIIX4 PM section.
*/
outb_p(SIO_DEV_SEL, SIO_INDEX);
outb_p(SIO_GP_DEV, SIO_DATA); /* Talk to GPIO regs. */
outb_p(SIO_DEV_MSB, SIO_INDEX);
outb_p(SIO_GP_MSB, SIO_DATA); /* MSB of GPIO base address */
outb_p(SIO_DEV_LSB, SIO_INDEX);
outb_p(SIO_GP_LSB, SIO_DATA); /* LSB of GPIO base address */
outb_p(SIO_DEV_ENB, SIO_INDEX);
outb_p(1, SIO_DATA); /* Enable GPIO registers. */
/*
* Now, we have to map the power management section to write
* a bit which enables access to the GPIO registers.
* What lunatic came up with this shit?
*/
outb_p(SIO_DEV_SEL, SIO_INDEX);
outb_p(SIO_PM_DEV, SIO_DATA); /* Talk to GPIO regs. */
outb_p(SIO_DEV_MSB, SIO_INDEX);
outb_p(SIO_PM_MSB, SIO_DATA); /* MSB of PM base address */
outb_p(SIO_DEV_LSB, SIO_INDEX);
outb_p(SIO_PM_LSB, SIO_DATA); /* LSB of PM base address */
outb_p(SIO_DEV_ENB, SIO_INDEX);
outb_p(1, SIO_DATA); /* Enable PM registers. */
/*
* Now, write the PM register which enables the GPIO registers.
*/
outb_p(SIO_PM_FER2, SIO_PM_INDEX);
outb_p(SIO_PM_GP_EN, SIO_PM_DATA);
/*
* Now, initialize the GPIO registers.
* We want them all to be inputs which is the
* power on default, so let's leave them alone.
* So, let's just read the board rev!
*/
raw = inb_p(SIO_GP_DATA1);
raw &= 0x7f; /* 7 bits of valid board revision ID. */
if (visws_board_type == VISWS_320) {
if (raw < 0x6) {
visws_board_rev = 4;
} else if (raw < 0xc) {
visws_board_rev = 5;
} else {
visws_board_rev = 6;
}
} else if (visws_board_type == VISWS_540) {
visws_board_rev = 2;
} else {
visws_board_rev = raw;
}
printk(KERN_INFO "Silicon Graphics Visual Workstation %s (rev %d) detected\n",
(visws_board_type == VISWS_320 ? "320" :
(visws_board_type == VISWS_540 ? "540" :
"unknown")), visws_board_rev);
}
