/*
- * Unmaintained SGI Visual Workstation support.
- * Split out from setup.c by davej@suse.de
+ * Machine specific setup for generic
*/
#include <linux/smp.h>
#include <linux/init.h>
#include <linux/interrupt.h>
-#include <linux/module.h>
-
-#include <asm/fixmap.h>
+#include <asm/acpi.h>
#include <asm/arch_hooks.h>
-#include <asm/io.h>
#include <asm/e820.h>
#include <asm/setup.h>
-#include "cobalt.h"
-#include "piix4.h"
-
-int no_broadcast;
-
-char visws_board_type = -1;
-char visws_board_rev = -1;
-
-void __init visws_get_board_type_and_rev(void)
-{
- int raw;
-
- visws_board_type = (char)(inb_p(PIIX_GPI_BD_REG) & PIIX_GPI_BD_REG)
- >> PIIX_GPI_BD_SHIFT;
- /*
- * 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);
-}
+#ifdef CONFIG_HOTPLUG_CPU
+#define DEFAULT_SEND_IPI (1)
+#else
+#define DEFAULT_SEND_IPI (0)
+#endif
+int no_broadcast=DEFAULT_SEND_IPI;
+
+/**
+ * pre_intr_init_hook - initialisation prior to setting up interrupt vectors
+ *
+ * Description:
+ * Perform any necessary interrupt initialisation prior to setting up
+ * the "ordinary" interrupt call gates. For legacy reasons, the ISA
+ * interrupts should be initialised here if the machine emulates a PC
+ * in any way.
+ **/
void __init pre_intr_init_hook(void)
{
- init_VISWS_APIC_irqs();
+ init_ISA_irqs();
}
+/*
+ * IRQ2 is cascade interrupt to second interrupt controller
+ */
+static struct irqaction irq2 = {
+ .handler = no_action,
+ .mask = CPU_MASK_NONE,
+ .name = "cascade",
+};
+
+/**
+ * intr_init_hook - post gate setup interrupt initialisation
+ *
+ * Description:
+ * Fill in any interrupts that may have been left out by the general
+ * init_IRQ() routine. interrupts having to do with the machine rather
+ * than the devices on the I/O bus (like APIC interrupts in intel MP
+ * systems) are started here.
+ **/
void __init intr_init_hook(void)
{
#ifdef CONFIG_X86_LOCAL_APIC
apic_intr_init();
#endif
+
+ if (!acpi_ioapic)
+ setup_irq(2, &irq2);
+}
+
+/**
+ * pre_setup_arch_hook - hook called prior to any setup_arch() execution
+ *
+ * Description:
+ * generally used to activate any machine specific identification
+ * routines that may be needed before setup_arch() runs. On VISWS
+ * this is used to get the board revision and type.
+ **/
+void __init pre_setup_arch_hook(void)
+{
}
-void __init pre_setup_arch_hook()
+/**
+ * trap_init_hook - initialise system specific traps
+ *
+ * Description:
+ * Called as the final act of trap_init(). Used in VISWS to initialise
+ * the various board specific APIC traps.
+ **/
+void __init trap_init_hook(void)
{
- visws_get_board_type_and_rev();
}
-static struct irqaction irq0 = {
- .handler = timer_interrupt,
- .flags = IRQF_DISABLED | IRQF_IRQPOLL,
- .name = "timer",
+static struct irqaction irq0 = {
+ .handler = timer_interrupt,
+ .flags = IRQF_DISABLED | IRQF_NOBALANCING | IRQF_IRQPOLL,
+ .mask = CPU_MASK_NONE,
+ .name = "timer"
};
+/**
+ * time_init_hook - do any specific initialisations for the system timer.
+ *
+ * Description:
+ * Must plug the system timer interrupt source at HZ into the IRQ listed
+ * in irq_vectors.h:TIMER_IRQ
+ **/
void __init time_init_hook(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);
-
- /* Wire cpu IDT entry to s/w handler (and Cobalt APIC to IDT) */
+ irq0.mask = cpumask_of_cpu(0);
setup_irq(0, &irq0);
}
-/* Hook 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;
-
-char * __init machine_specific_memory_setup(void)
+#ifdef CONFIG_MCA
+/**
+ * mca_nmi_hook - hook into MCA specific NMI chain
+ *
+ * Description:
+ * The MCA (Microchannel Architecture) has an NMI chain for NMI sources
+ * along the MCA bus. Use this to hook into that chain if you will need
+ * it.
+ **/
+void mca_nmi_hook(void)
{
- long long gfx_mem_size = 8 * MB;
+ /* If I recall correctly, there's a whole bunch of other things that
+ * we can do to check for NMI problems, but that's all I know about
+ * at the moment.
+ */
- mem_size = boot_params.alt_mem_k;
+ printk("NMI generated from unknown source!\n");
+}
+#endif
- if (!mem_size) {
- printk(KERN_WARNING "Bootloader didn't set memory size, upgrade it !\n");
- mem_size = 128 * MB;
- }
+static __init int no_ipi_broadcast(char *str)
+{
+ get_option(&str, &no_broadcast);
+ printk ("Using %s mode\n", no_broadcast ? "No IPI Broadcast" :
+ "IPI Broadcast");
+ return 1;
+}
- /*
- * 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;
- }
+__setup("no_ipi_broadcast=", no_ipi_broadcast);
- /*
- * Trim to nearest MB
- */
- sgivwfb_mem_size &= ~((1 << 20) - 1);
- sgivwfb_mem_phys = mem_size - gfx_mem_size;
+static int __init print_ipi_mode(void)
+{
+ printk ("Using IPI %s mode\n", no_broadcast ? "No-Shortcut" :
+ "Shortcut");
+ return 0;
+}
- 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);
+late_initcall(print_ipi_mode);
- return "PROM";
-}
git.samba.org / sfrench / cifs-2.6.git / blobdiff