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Subject[PATCH] visws: core (9/13)
From
Hi.

This patch contains core support for visws subarch.

Please consider applying.

Best regards.

--
Andrey Panin | Embedded systems software developer
pazke@orbita1.ru | PGP key: wwwkeys.pgp.net
diff -urN -X /usr/share/dontdiff linux-2.5.60.vanilla/arch/i386/kernel/setup.c linux-2.5.60/arch/i386/kernel/setup.c
--- linux-2.5.60.vanilla/arch/i386/kernel/setup.c Thu Feb 13 20:29:06 2003
+++ linux-2.5.60/arch/i386/kernel/setup.c Thu Feb 13 20:42:02 2003
@@ -92,7 +92,6 @@
extern int root_mountflags;
extern char _text, _etext, _edata, _end;
extern int blk_nohighio;
-void __init visws_get_board_type_and_rev(void);

unsigned long saved_videomode;

diff -urN -X /usr/share/dontdiff linux-2.5.60.vanilla/arch/i386/mach-visws/Makefile linux-2.5.60/arch/i386/mach-visws/Makefile
--- linux-2.5.60.vanilla/arch/i386/mach-visws/Makefile Thu Feb 13 20:29:07 2003
+++ linux-2.5.60/arch/i386/mach-visws/Makefile Thu Feb 13 20:42:02 2003
@@ -4,8 +4,7 @@

EXTRA_CFLAGS += -I../kernel

-obj-y := setup.o traps.o
+obj-y := setup.o traps.o reboot.o

-obj-$(CONFIG_PCI) += pci-visws.o
obj-$(CONFIG_X86_VISWS_APIC) += visws_apic.o
obj-$(CONFIG_X86_LOCAL_APIC) += mpparse.o
diff -urN -X /usr/share/dontdiff linux-2.5.60.vanilla/arch/i386/mach-visws/mpparse.c linux-2.5.60/arch/i386/mach-visws/mpparse.c
--- linux-2.5.60.vanilla/arch/i386/mach-visws/mpparse.c Thu Feb 13 20:29:07 2003
+++ linux-2.5.60/arch/i386/mach-visws/mpparse.c Thu Feb 13 20:42:02 2003
@@ -1,17 +1,15 @@
-#include <linux/mm.h>
-#include <linux/irq.h>
-#include <linux/init.h>
-#include <linux/delay.h>
+
#include <linux/config.h>
-#include <linux/bootmem.h>
-#include <linux/smp_lock.h>
-#include <linux/kernel_stat.h>
-#include <linux/mc146818rtc.h>
+#include <linux/init.h>
+#include <linux/smp.h>

#include <asm/smp.h>
-#include <asm/mtrr.h>
+#include <asm/apic.h>
#include <asm/mpspec.h>
-#include <asm/pgalloc.h>
+#include <asm/io.h>
+
+#include "cobalt.h"
+#include "mach_apic.h"

/* Have we found an MP table */
int smp_found_config;
@@ -43,25 +41,84 @@
/* Processor that is doing the boot up */
unsigned int boot_cpu_physical_apicid = -1U;
unsigned int boot_cpu_logical_apicid = -1U;
+
/* Internal processor count */
static unsigned int num_processors;

/* Bitmask of physically existing CPUs */
unsigned long phys_cpu_present_map;

+u8 raw_phys_apicid[NR_CPUS] = { [0 ... NR_CPUS - 1] = BAD_APICID };
+
/*
* The Visual Workstation is Intel MP compliant in the hardware
* sense, but it doesn't have a BIOS(-configuration table).
* No problem for Linux.
*/
+
+void __init MP_processor_info (struct mpc_config_processor *m)
+{
+ int ver, logical_apicid;
+
+ if (!(m->mpc_cpuflag & CPU_ENABLED))
+ return;
+
+ logical_apicid = m->mpc_apicid;
+ printk(KERN_INFO "%sCPU #%d %ld:%ld 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;
+ boot_cpu_logical_apicid = logical_apicid;
+ }
+
+ num_processors++;
+
+ if (m->mpc_apicid > MAX_APICS) {
+ printk(KERN_ERR "Processor #%d INVALID. (Max ID: %d).\n",
+ m->mpc_apicid, MAX_APICS);
+ --num_processors;
+ return;
+ }
+ ver = m->mpc_apicver;
+
+ phys_cpu_present_map |= apicid_to_cpu_present(m->mpc_apicid);
+ /*
+ * 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;
+ raw_phys_apicid[num_processors - 1] = m->mpc_apicid;
+}
+
void __init find_smp_config(void)
{
- smp_found_config = 1;
+ 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);

- phys_cpu_present_map |= 2; /* or in id 1 */
- apic_version[1] |= 0x10; /* integrated APIC */
- apic_version[0] |= 0x10;
+ ncpus = CO_CPU_MAX;
+ }
+
+ smp_found_config = 1;
+ while (ncpus--)
+ MP_processor_info(mp++);

mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
}

+void __init get_smp_config (void)
+{
+}
diff -urN -X /usr/share/dontdiff linux-2.5.60.vanilla/arch/i386/mach-visws/reboot.c linux-2.5.60/arch/i386/mach-visws/reboot.c
--- linux-2.5.60.vanilla/arch/i386/mach-visws/reboot.c Thu Jan 1 03:00:00 1970
+++ linux-2.5.60/arch/i386/mach-visws/reboot.c Thu Feb 13 20:42:02 2003
@@ -0,0 +1,48 @@
+
+#include <linux/smp.h>
+#include <linux/delay.h>
+#include <linux/platform.h>
+
+#include <asm/io.h>
+#include "piix4.h"
+
+void (*pm_power_off)(void);
+
+int reboot_thru_bios;
+int reboot_smp;
+
+void machine_restart(char * __unused)
+{
+#ifdef CONFIG_SMP
+ smp_send_stop();
+#endif
+
+ /*
+ * Visual Workstations restart after this
+ * register is poked on the PIIX4
+ */
+ outb(PIIX4_RESET_VAL, PIIX4_RESET_PORT);
+}
+
+void 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);
+}
+
+void machine_halt(void)
+{
+}
diff -urN -X /usr/share/dontdiff linux-2.5.60.vanilla/arch/i386/mach-visws/setup.c linux-2.5.60/arch/i386/mach-visws/setup.c
--- linux-2.5.60.vanilla/arch/i386/mach-visws/setup.c Thu Feb 13 20:29:07 2003
+++ linux-2.5.60/arch/i386/mach-visws/setup.c Thu Feb 13 20:42:02 2003
@@ -9,67 +9,26 @@
#include <linux/interrupt.h>

#include <asm/fixmap.h>
-#include <asm/cobalt.h>
#include <asm/arch_hooks.h>
#include <asm/io.h>
+#include "cobalt.h"
+#include "piix4.h"

char visws_board_type = -1;
char visws_board_rev = -1;

-#define PIIX_PM_START 0x0F80
-
-#define SIO_GPIO_START 0x0FC0
-
-#define SIO_PM_START 0x0FC8
-
-#define PMBASE PIIX_PM_START
-#define GPIREG0 (PMBASE+0x30)
-#define GPIREG(x) (GPIREG0+((x)/8))
-#define PIIX_GPI_BD_ID1 18
-#define PIIX_GPI_BD_REG GPIREG(PIIX_GPI_BD_ID1)
-
-#define PIIX_GPI_BD_SHIFT (PIIX_GPI_BD_ID1 % 8)
-
-#define SIO_INDEX 0x2e
-#define SIO_DATA 0x2f
-
-#define SIO_DEV_SEL 0x7
-#define SIO_DEV_ENB 0x30
-#define SIO_DEV_MSB 0x60
-#define SIO_DEV_LSB 0x61
-
-#define SIO_GP_DEV 0x7
-
-#define SIO_GP_BASE SIO_GPIO_START
-#define SIO_GP_MSB (SIO_GP_BASE>>8)
-#define SIO_GP_LSB (SIO_GP_BASE&0xff)
-
-#define SIO_GP_DATA1 (SIO_GP_BASE+0)
-
-#define SIO_PM_DEV 0x8
-
-#define SIO_PM_BASE SIO_PM_START
-#define SIO_PM_MSB (SIO_PM_BASE>>8)
-#define SIO_PM_LSB (SIO_PM_BASE&0xff)
-#define SIO_PM_INDEX (SIO_PM_BASE+0)
-#define SIO_PM_DATA (SIO_PM_BASE+1)
-
-#define SIO_PM_FER2 0x1
-
-#define SIO_PM_GP_EN 0x80
-
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.
- */
+ /*
+ * 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. */

@@ -82,11 +41,11 @@
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?
- */
+ /*
+ * 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. */

@@ -99,18 +58,18 @@
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.
- */
+ /*
+ * 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!
- */
+ /*
+ * 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. */

@@ -128,10 +87,10 @@
visws_board_rev = raw;
}

- printk(KERN_INFO "Silicon Graphics %s (rev %d)\n",
- visws_board_type == VISWS_320 ? "320" :
+ 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);
+ "unknown")), visws_board_rev);
}

void __init pre_intr_init_hook(void)
@@ -150,11 +109,16 @@
{
visws_get_board_type_and_rev();
}
-static struct irqaction irq0 = { timer_interrupt, SA_INTERRUPT, 0, "timer", NULL, NULL};
+
+static struct irqaction irq0 = {
+ .handler = timer_interrupt,
+ .flags = SA_INTERRUPT,
+ .name = "timer",
+};

void __init time_init_hook(void)
{
- printk("Starting Cobalt Timer system clock\n");
+ printk(KERN_INFO "Starting Cobalt Timer system clock\n");

/* Set the countdown value */
co_cpu_write(CO_CPU_TIMEVAL, CO_TIME_HZ/HZ);
@@ -166,5 +130,5 @@
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) */
- setup_irq(CO_IRQ_TIMER, &irq0);
+ setup_irq(0, &irq0);
}
diff -urN -X /usr/share/dontdiff linux-2.5.60.vanilla/arch/i386/mach-visws/traps.c linux-2.5.60/arch/i386/mach-visws/traps.c
--- linux-2.5.60.vanilla/arch/i386/mach-visws/traps.c Thu Feb 13 20:29:07 2003
+++ linux-2.5.60/arch/i386/mach-visws/traps.c Thu Feb 13 20:42:02 2003
@@ -3,132 +3,68 @@
#include <linux/config.h>
#include <linux/sched.h>
#include <linux/kernel.h>
-#include <linux/string.h>
-#include <linux/errno.h>
-#include <linux/ptrace.h>
-#include <linux/timer.h>
-#include <linux/mm.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/spinlock.h>
-#include <linux/interrupt.h>
-#include <linux/highmem.h>
#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/pci_ids.h>

-#include <asm/system.h>
-#include <asm/uaccess.h>
#include <asm/io.h>
-#include <asm/atomic.h>
-#include <asm/debugreg.h>
-#include <asm/desc.h>
-#include <asm/i387.h>
-
-#include <asm/smp.h>
#include <asm/pgalloc.h>
#include <asm/arch_hooks.h>
+#include <asm/apic.h>
+#include "cobalt.h"
+#include "lithium.h"

-#ifdef CONFIG_X86_VISWS_APIC
-#include <asm/fixmap.h>
-#include <asm/cobalt.h>
-#include <asm/lithium.h>
-#endif
-
-#ifdef CONFIG_X86_VISWS_APIC
-
-/*
- * On Rev 005 motherboards legacy device interrupt lines are wired directly
- * to Lithium from the 307. But the PROM leaves the interrupt type of each
- * 307 logical device set appropriate for the 8259. Later we'll actually use
- * the 8259, but for now we have to flip the interrupt types to
- * level triggered, active lo as required by Lithium.
- */
-
-#define REG 0x2e /* The register to read/write */
-#define DEV 0x07 /* Register: Logical device select */
-#define VAL 0x2f /* The value to read/write */

-static void
-superio_outb(int dev, int reg, int val)
-{
- outb(DEV, REG);
- outb(dev, VAL);
- outb(reg, REG);
- outb(val, VAL);
-}
+#define A01234 (LI_INTA_0 | LI_INTA_1 | LI_INTA_2 | LI_INTA_3 | LI_INTA_4)
+#define BCD (LI_INTB | LI_INTC | LI_INTD)
+#define ALLDEVS (A01234 | BCD)

-static int __attribute__ ((unused))
-superio_inb(int dev, int reg)
+static __init void lithium_init(void)
{
- outb(DEV, REG);
- outb(dev, VAL);
- outb(reg, REG);
- return inb(VAL);
-}
-
-#define FLOP 3 /* floppy logical device */
-#define PPORT 4 /* parallel logical device */
-#define UART5 5 /* uart2 logical device (not wired up) */
-#define UART6 6 /* uart1 logical device (THIS is the serial port!) */
-#define IDEST 0x70 /* int. destination (which 307 IRQ line) reg. */
-#define ITYPE 0x71 /* interrupt type register */
-
-/* interrupt type bits */
-#define LEVEL 0x01 /* bit 0, 0 == edge triggered */
-#define ACTHI 0x02 /* bit 1, 0 == active lo */
+ set_fixmap(FIX_LI_PCIA, LI_PCI_A_PHYS);
+ set_fixmap(FIX_LI_PCIB, LI_PCI_B_PHYS);

-static __init void
-superio_init(void)
-{
- if (visws_board_type == VISWS_320 && visws_board_rev == 5) {
- superio_outb(UART6, IDEST, 0); /* 0 means no intr propagated */
- printk("SGI 320 rev 5: disabling 307 uart1 interrupt\n");
+ if ((li_pcia_read16(PCI_VENDOR_ID) != PCI_VENDOR_ID_SGI) ||
+ (li_pcia_read16(PCI_DEVICE_ID) != PCI_VENDOR_ID_SGI_LITHIUM)) {
+ printk(KERN_EMERG "Lithium hostbridge %c not found\n", 'A');
+ panic("This machine is not SGI Visual Workstation 320/540");
}
-}

-static __init void
-lithium_init(void)
-{
- set_fixmap(FIX_LI_PCIA, LI_PCI_A_PHYS);
- printk("Lithium PCI Bridge A, Bus Number: %d\n",
- li_pcia_read16(LI_PCI_BUSNUM) & 0xff);
- set_fixmap(FIX_LI_PCIB, LI_PCI_B_PHYS);
- printk("Lithium PCI Bridge B (PIIX4), Bus Number: %d\n",
- li_pcib_read16(LI_PCI_BUSNUM) & 0xff);
+ if ((li_pcib_read16(PCI_VENDOR_ID) != PCI_VENDOR_ID_SGI) ||
+ (li_pcib_read16(PCI_DEVICE_ID) != PCI_VENDOR_ID_SGI_LITHIUM)) {
+ printk(KERN_EMERG "Lithium hostbridge %c not found\n", 'B');
+ panic("This machine is not SGI Visual Workstation 320/540");
+ }

- /* XXX blindly enables all interrupts */
- li_pcia_write16(LI_PCI_INTEN, 0xffff);
- li_pcib_write16(LI_PCI_INTEN, 0xffff);
+ li_pcia_write16(LI_PCI_INTEN, ALLDEVS);
+ li_pcib_write16(LI_PCI_INTEN, ALLDEVS);
}

-static __init void
-cobalt_init(void)
+static __init void cobalt_init(void)
{
/*
* On normal SMP PC this is used only with SMP, but we have to
* use it and set it up here to start the Cobalt clock
*/
set_fixmap(FIX_APIC_BASE, APIC_DEFAULT_PHYS_BASE);
- printk("Local APIC ID %lx\n", apic_read(APIC_ID));
- printk("Local APIC Version %lx\n", apic_read(APIC_LVR));
+ setup_local_APIC();
+ printk(KERN_INFO "Local APIC Version %#lx, ID %#lx\n",
+ apic_read(APIC_LVR), apic_read(APIC_ID));

set_fixmap(FIX_CO_CPU, CO_CPU_PHYS);
- printk("Cobalt Revision %lx\n", co_cpu_read(CO_CPU_REV));
-
set_fixmap(FIX_CO_APIC, CO_APIC_PHYS);
- printk("Cobalt APIC ID %lx\n", co_apic_read(CO_APIC_ID));
+ printk(KERN_INFO "Cobalt Revision %#lx, APIC ID %#lx\n",
+ co_cpu_read(CO_CPU_REV), co_apic_read(CO_APIC_ID));

/* Enable Cobalt APIC being careful to NOT change the ID! */
- co_apic_write(CO_APIC_ID, co_apic_read(CO_APIC_ID)|CO_APIC_ENABLE);
+ co_apic_write(CO_APIC_ID, co_apic_read(CO_APIC_ID) | CO_APIC_ENABLE);

- printk("Cobalt APIC enabled: ID reg %lx\n", co_apic_read(CO_APIC_ID));
+ printk(KERN_INFO "Cobalt APIC enabled: ID reg %#lx\n",
+ co_apic_read(CO_APIC_ID));
}
-#endif

-void __init trap_init_hook()
+void __init trap_init_hook(void)
{
-#ifdef CONFIG_X86_VISWS_APIC
- superio_init();
lithium_init();
cobalt_init();
-#endif
}
diff -urN -X /usr/share/dontdiff linux-2.5.60.vanilla/arch/i386/mach-visws/visws_apic.c linux-2.5.60/arch/i386/mach-visws/visws_apic.c
--- linux-2.5.60.vanilla/arch/i386/mach-visws/visws_apic.c Thu Feb 13 20:29:07 2003
+++ linux-2.5.60/arch/i386/mach-visws/visws_apic.c Thu Feb 13 20:42:02 2003
@@ -1,5 +1,5 @@
/*
- * linux/arch/i386/kernel/visws_apic.c
+ * linux/arch/i386/mach_visws/visws_apic.c
*
* Copyright (C) 1999 Bent Hagemark, Ingo Molnar
*
@@ -10,234 +10,180 @@
* hardware in the system uses this controller directly. Legacy devices
* are connected to the PIIX4 which in turn has its 8259(s) connected to
* a of the Cobalt APIC entry.
+ *
+ * 09/02/2000 - Updated for 2.4 by jbarnes@sgi.com
+ *
+ * 25/11/2002 - Updated for 2.5 by Andrey Panin <pazke@orbita1.ru>
*/

-#include <linux/ptrace.h>
-#include <linux/errno.h>
+#include <linux/config.h>
#include <linux/kernel_stat.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/ioport.h>
#include <linux/interrupt.h>
-#include <linux/timex.h>
-#include <linux/slab.h>
-#include <linux/random.h>
-#include <linux/smp.h>
+#include <linux/irq.h>
#include <linux/smp_lock.h>
#include <linux/init.h>

-#include <asm/system.h>
#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/bitops.h>
-#include <asm/smp.h>
-#include <asm/pgtable.h>
-#include <asm/delay.h>
-#include <asm/desc.h>
-
-#include <asm/cobalt.h>
-
-#include <linux/irq.h>
-
-/*
- * This is the PIIX4-based 8259 that is wired up indirectly to Cobalt
- * -- not the manner expected by the normal 8259 code in irq.c.
- *
- * there is a 'master' physical interrupt source that gets sent to
- * the CPU. But in the chipset there are various 'virtual' interrupts
- * waiting to be handled. We represent this to Linux through a 'master'
- * interrupt controller type, and through a special virtual interrupt-
- * controller. Device drivers only see the virtual interrupt sources.
- */
-
-#define CO_IRQ_BASE 0x20 /* This is the 0x20 in init_IRQ()! */
-
-static void startup_piix4_master_irq(unsigned int irq);
-static void shutdown_piix4_master_irq(unsigned int irq);
-static void do_piix4_master_IRQ(unsigned int irq, struct pt_regs * regs);
-#define enable_piix4_master_irq startup_piix4_master_irq
-#define disable_piix4_master_irq shutdown_piix4_master_irq
+#include <asm/apic.h>
+#include <asm/i8259.h>

-static struct hw_interrupt_type piix4_master_irq_type = {
- "PIIX4-master",
- startup_piix4_master_irq,
- shutdown_piix4_master_irq,
- do_piix4_master_IRQ,
- enable_piix4_master_irq,
- disable_piix4_master_irq
-};
-
-static void enable_piix4_virtual_irq(unsigned int irq);
-static void disable_piix4_virtual_irq(unsigned int irq);
-#define startup_piix4_virtual_irq enable_piix4_virtual_irq
-#define shutdown_piix4_virtual_irq disable_piix4_virtual_irq
-
-static struct hw_interrupt_type piix4_virtual_irq_type = {
- "PIIX4-virtual",
- startup_piix4_virtual_irq,
- shutdown_piix4_virtual_irq,
- 0, /* no handler, it's never called physically */
- enable_piix4_virtual_irq,
- disable_piix4_virtual_irq
-};
-
-/*
- * This is the SGI Cobalt (IO-)APIC:
- */
+#include "cobalt.h"
+#include "irq_vectors.h"

-static void do_cobalt_IRQ(unsigned int irq, struct pt_regs * regs);
-static void enable_cobalt_irq(unsigned int irq);
-static void disable_cobalt_irq(unsigned int irq);
-static void startup_cobalt_irq(unsigned int irq);
-#define shutdown_cobalt_irq disable_cobalt_irq

-static spinlock_t irq_controller_lock = SPIN_LOCK_UNLOCKED;
+int irq_vector[NR_IRQS] = { FIRST_EXTERNAL_VECTOR, 0 };

-static struct hw_interrupt_type cobalt_irq_type = {
- "Cobalt-APIC",
- startup_cobalt_irq,
- shutdown_cobalt_irq,
- do_cobalt_IRQ,
- enable_cobalt_irq,
- disable_cobalt_irq
-};

+static spinlock_t cobalt_lock = SPIN_LOCK_UNLOCKED;

/*
- * Not an __init, needed by the reboot code
+ * Set the given Cobalt APIC Redirection Table entry to point
+ * to the given IDT vector/index.
*/
-void disable_IO_APIC(void)
+static inline void co_apic_set(int entry, int irq)
{
- /* Nop on Cobalt */
-}
+ co_apic_write(CO_APIC_LO(entry), CO_APIC_LEVEL | irq_vector[irq]);
+ co_apic_write(CO_APIC_HI(entry), 0);
+}

/*
* Cobalt (IO)-APIC functions to handle PCI devices.
*/
-
-static void disable_cobalt_irq(unsigned int irq)
+static inline int co_apic_ide0_hack(void)
{
- /* XXX undo the APIC entry here? */
+ extern char visws_board_type;
+ extern char visws_board_rev;

- /*
- * definitely, we do not want to have IRQ storms from
- * unused devices --mingo
- */
+ if (visws_board_type == VISWS_320 && visws_board_rev == 5)
+ return 5;
+ return CO_APIC_IDE0;
}

-static void enable_cobalt_irq(unsigned int irq)
+static int is_co_apic(unsigned int irq)
{
+ if (IS_CO_APIC(irq))
+ return CO_APIC(irq);
+
+ switch (irq) {
+ case 0: return CO_APIC_CPU;
+ case CO_IRQ_IDE0: return co_apic_ide0_hack();
+ case CO_IRQ_IDE1: return CO_APIC_IDE1;
+ default: return -1;
+ }
}

+
/*
- * Set the given Cobalt APIC Redirection Table entry to point
- * to the given IDT vector/index.
+ * This is the SGI Cobalt (IO-)APIC:
*/
-static void co_apic_set(int entry, int idtvec)
+
+static void enable_cobalt_irq(unsigned int irq)
{
- co_apic_write(CO_APIC_LO(entry), CO_APIC_LEVEL | (CO_IRQ_BASE+idtvec));
- co_apic_write(CO_APIC_HI(entry), 0);
+ co_apic_set(is_co_apic(irq), irq);
+}

- printk("Cobalt APIC Entry %d IDT Vector %d\n", entry, idtvec);
+static void disable_cobalt_irq(unsigned int irq)
+{
+ int entry = is_co_apic(irq);
+
+ co_apic_write(CO_APIC_LO(entry), CO_APIC_MASK);
+ co_apic_read(CO_APIC_LO(entry));
}

/*
* "irq" really just serves to identify the device. Here is where we
* map this to the Cobalt APIC entry where it's physically wired.
- * This is called via request_irq -> setup_x86_irq -> irq_desc->startup()
+ * This is called via request_irq -> setup_irq -> irq_desc->startup()
*/
-static void startup_cobalt_irq(unsigned int irq)
+static unsigned int startup_cobalt_irq(unsigned int irq)
{
- /*
- * These "irq"'s are wired to the same Cobalt APIC entries
- * for all (known) motherboard types/revs
- */
- switch (irq) {
- case CO_IRQ_TIMER: co_apic_set(CO_APIC_CPU, CO_IRQ_TIMER);
- return;
+ unsigned long flags;

- case CO_IRQ_ENET: co_apic_set(CO_APIC_ENET, CO_IRQ_ENET);
- return;
+ spin_lock_irqsave(&cobalt_lock, flags);
+ if ((irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS | IRQ_WAITING)))
+ irq_desc[irq].status &= ~(IRQ_DISABLED | IRQ_INPROGRESS | IRQ_WAITING);
+ enable_cobalt_irq(irq);
+ spin_unlock_irqrestore(&cobalt_lock, flags);
+ return 0;
+}

- case CO_IRQ_SERIAL: return; /* XXX move to piix4-8259 "virtual" */
+static void ack_cobalt_irq(unsigned int irq)
+{
+ unsigned long flags;

- case CO_IRQ_8259: co_apic_set(CO_APIC_8259, CO_IRQ_8259);
- return;
-
- case CO_IRQ_IDE:
- switch (visws_board_type) {
- case VISWS_320:
- switch (visws_board_rev) {
- case 5:
- co_apic_set(CO_APIC_0_5_IDE0, CO_IRQ_IDE);
- co_apic_set(CO_APIC_0_5_IDE1, CO_IRQ_IDE);
- return;
- case 6:
- co_apic_set(CO_APIC_0_6_IDE0, CO_IRQ_IDE);
- co_apic_set(CO_APIC_0_6_IDE1, CO_IRQ_IDE);
- return;
- }
- case VISWS_540:
- switch (visws_board_rev) {
- case 2:
- co_apic_set(CO_APIC_1_2_IDE0, CO_IRQ_IDE);
- return;
- }
- }
- break;
- default:
- panic("huh?");
- }
+ spin_lock_irqsave(&cobalt_lock, flags);
+ disable_cobalt_irq(irq);
+ apic_write(APIC_EOI, APIC_EIO_ACK);
+ spin_unlock_irqrestore(&cobalt_lock, flags);
}

+static void end_cobalt_irq(unsigned int irq)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&cobalt_lock, flags);
+ if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS)))
+ enable_cobalt_irq(irq);
+ spin_unlock_irqrestore(&cobalt_lock, flags);
+}
+
+static struct hw_interrupt_type cobalt_irq_type = {
+ .typename = "Cobalt-APIC",
+ .startup = startup_cobalt_irq,
+ .shutdown = disable_cobalt_irq,
+ .enable = enable_cobalt_irq,
+ .disable = disable_cobalt_irq,
+ .ack = ack_cobalt_irq,
+ .end = end_cobalt_irq,
+};
+
+
/*
- * This is the handle() op in do_IRQ()
+ * This is the PIIX4-based 8259 that is wired up indirectly to Cobalt
+ * -- not the manner expected by the code in i8259.c.
+ *
+ * there is a 'master' physical interrupt source that gets sent to
+ * the CPU. But in the chipset there are various 'virtual' interrupts
+ * waiting to be handled. We represent this to Linux through a 'master'
+ * interrupt controller type, and through a special virtual interrupt-
+ * controller. Device drivers only see the virtual interrupt sources.
*/
-static void do_cobalt_IRQ(unsigned int irq, struct pt_regs * regs)
+static unsigned int startup_piix4_master_irq(unsigned int irq)
{
- struct irqaction * action;
- irq_desc_t *desc = irq_desc + irq;
+ init_8259A(0);

- spin_lock(&irq_controller_lock);
- {
- unsigned int status;
- /* XXX APIC EOI? */
- status = desc->status & ~(IRQ_REPLAY | IRQ_WAITING);
- action = NULL;
- if (!(status & (IRQ_DISABLED | IRQ_INPROGRESS))) {
- action = desc->action;
- status |= IRQ_INPROGRESS;
- }
- desc->status = status;
- }
- spin_unlock(&irq_controller_lock);
+ return startup_cobalt_irq(irq);
+}

- /* Exit early if we had no action or it was disabled */
- if (!action)
- return;
-
- handle_IRQ_event(irq, regs, action);
-
- (void)co_cpu_read(CO_CPU_REV); /* Sync driver ack to its h/w */
- apic_write(APIC_EOI, APIC_EIO_ACK); /* Send EOI to Cobalt APIC */
-
- spin_lock(&irq_controller_lock);
- {
- unsigned int status = desc->status & ~IRQ_INPROGRESS;
- desc->status = status;
- if (!(status & IRQ_DISABLED))
- enable_cobalt_irq(irq);
- }
- spin_unlock(&irq_controller_lock);
+static void end_piix4_master_irq(unsigned int irq)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&cobalt_lock, flags);
+ enable_cobalt_irq(irq);
+ spin_unlock_irqrestore(&cobalt_lock, flags);
}

+static struct hw_interrupt_type piix4_master_irq_type = {
+ .typename = "PIIX4-master",
+ .startup = startup_piix4_master_irq,
+ .ack = ack_cobalt_irq,
+ .end = end_piix4_master_irq,
+};
+
+
+static struct hw_interrupt_type piix4_virtual_irq_type = {
+ .typename = "PIIX4-virtual",
+ .startup = startup_8259A_irq,
+ .shutdown = disable_8259A_irq,
+ .enable = enable_8259A_irq,
+ .disable = disable_8259A_irq,
+};
+
+
/*
- * PIIX4-8259 master/virtual functions to handle:
- *
- * floppy
- * parallel
- * serial
- * audio (?)
+ * PIIX4-8259 master/virtual functions to handle interrupt requests
+ * from legacy devices: floppy, parallel, serial, rtc.
*
* None of these get Cobalt APIC entries, neither do they have IDT
* entries. These interrupts are purely virtual and distributed from
@@ -250,161 +196,112 @@
* enable_irq gets the right irq. This 'master' irq is never directly
* manipulated by any driver.
*/
-
-static void startup_piix4_master_irq(unsigned int irq)
+static void piix4_master_intr(int irq, void *dev_id, struct pt_regs * regs)
{
- /* ICW1 */
- outb(0x11, 0x20);
- outb(0x11, 0xa0);
+ int realirq;
+ irq_desc_t *desc;
+ unsigned long flags;

- /* ICW2 */
- outb(0x08, 0x21);
- outb(0x70, 0xa1);
+ spin_lock_irqsave(&i8259A_lock, flags);

- /* ICW3 */
- outb(0x04, 0x21);
- outb(0x02, 0xa1);
-
- /* ICW4 */
- outb(0x01, 0x21);
- outb(0x01, 0xa1);
-
- /* OCW1 - disable all interrupts in both 8259's */
- outb(0xff, 0x21);
- outb(0xff, 0xa1);
-
- startup_cobalt_irq(irq);
-}
+ /* Find out what's interrupting in the PIIX4 master 8259 */
+ outb(0x0c, 0x20); /* OCW3 Poll command */
+ realirq = inb(0x20);

-static void shutdown_piix4_master_irq(unsigned int irq)
-{
/*
- * [we skip the 8259 magic here, not strictly necessary]
+ * Bit 7 == 0 means invalid/spurious
*/
+ if (unlikely(!(realirq & 0x80)))
+ goto out_unlock;

- shutdown_cobalt_irq(irq);
-}
-
-static void do_piix4_master_IRQ(unsigned int irq, struct pt_regs * regs)
-{
- int realirq, mask;
+ realirq &= 7;

- /* Find out what's interrupting in the PIIX4 8259 */
+ if (unlikely(realirq == 2)) {
+ outb(0x0c, 0xa0);
+ realirq = inb(0xa0);

- spin_lock(&irq_controller_lock);
- outb(0x0c, 0x20); /* OCW3 Poll command */
- realirq = inb(0x20);
+ if (unlikely(!(realirq & 0x80)))
+ goto out_unlock;

- if (!(realirq & 0x80)) {
- /*
- * Bit 7 == 0 means invalid/spurious
- */
- goto out_unlock;
+ realirq = (realirq & 7) + 8;
}
- realirq &= 0x7f;

- /*
- * mask and ack the 8259
- */
- mask = inb(0x21);
- if ((mask >> realirq) & 0x01)
- /*
- * This IRQ is masked... ignore
- */
- goto out_unlock;
+ /* mask and ack interrupt */
+ cached_irq_mask |= 1 << realirq;
+ if (unlikely(realirq > 7)) {
+ inb(0xa1);
+ outb(cached_A1, 0xa1);
+ outb(0x60 + (realirq & 7), 0xa0);
+ outb(0x60 + 2, 0x20);
+ } else {
+ inb(0x21);
+ outb(cached_21, 0x21);
+ outb(0x60 + realirq, 0x20);
+ }

- outb(mask | (1<<realirq), 0x21);
- /*
- * OCW2 - non-specific EOI
- */
- outb(0x20, 0x20);
+ spin_unlock_irqrestore(&i8259A_lock, flags);

- spin_unlock(&irq_controller_lock);
+ desc = irq_desc + realirq;

/*
* handle this 'virtual interrupt' as a Cobalt one now.
*/
- kstat_cpu(smp_processor_id()).irqs[irq]++;
- do_cobalt_IRQ(realirq, regs);
+ kstat_cpu(smp_processor_id()).irqs[realirq]++;

- spin_lock(&irq_controller_lock);
- {
- irq_desc_t *desc = irq_desc + realirq;
+ if (likely(desc->action != NULL))
+ handle_IRQ_event(realirq, regs, desc->action);
+
+ if (!(desc->status & IRQ_DISABLED))
+ enable_8259A_irq(realirq);

- if (!(desc->status & IRQ_DISABLED))
- enable_piix4_virtual_irq(realirq);
- }
- spin_unlock(&irq_controller_lock);
return;

out_unlock:
- spin_unlock(&irq_controller_lock);
+ spin_unlock_irqrestore(&i8259A_lock, flags);
return;
}

-static void enable_piix4_virtual_irq(unsigned int irq)
-{
- /*
- * assumes this irq is one of the legacy devices
- */
-
- unsigned int mask = inb(0x21);
- mask &= ~(1 << irq);
- outb(mask, 0x21);
- enable_cobalt_irq(irq);
-}
-
-/*
- * assumes this irq is one of the legacy devices
- */
-static void disable_piix4_virtual_irq(unsigned int irq)
-{
- unsigned int mask;
-
- disable_cobalt_irq(irq);
+static struct irqaction master_action = {
+ .handler = piix4_master_intr,
+ .name = "PIIX4-8259",
+};

- mask = inb(0x21);
- mask &= ~(1 << irq);
- outb(mask, 0x21);
-}
+static struct irqaction cascade_action = {
+ .handler = no_action,
+ .name = "cascade",
+};

-static struct irqaction master_action =
- { no_action, 0, 0, "PIIX4-8259", NULL, NULL };

void init_VISWS_APIC_irqs(void)
{
int i;

- for (i = 0; i < 16; i++) {
+ for (i = 0; i < CO_IRQ_APIC0 + CO_APIC_LAST + 1; i++) {
irq_desc[i].status = IRQ_DISABLED;
irq_desc[i].action = 0;
irq_desc[i].depth = 1;

- /*
- * Cobalt IRQs are mapped to standard ISA
- * interrupt vectors:
- */
- switch (i) {
- /*
- * Only CO_IRQ_8259 will be raised
- * externally.
- */
- case CO_IRQ_8259:
+ if (i == 0) {
+ irq_desc[i].handler = &cobalt_irq_type;
+ }
+ else if (i == CO_IRQ_IDE0) {
+ irq_desc[i].handler = &cobalt_irq_type;
+ }
+ else if (i == CO_IRQ_IDE1) {
+ irq_desc[i].handler = &cobalt_irq_type;
+ }
+ else if (i == CO_IRQ_8259) {
irq_desc[i].handler = &piix4_master_irq_type;
- break;
- case CO_IRQ_FLOPPY:
- case CO_IRQ_PARLL:
+ }
+ else if (i < CO_IRQ_APIC0) {
irq_desc[i].handler = &piix4_virtual_irq_type;
- break;
- default:
+ }
+ else if (IS_CO_APIC(i)) {
irq_desc[i].handler = &cobalt_irq_type;
- break;
}
+ irq_vector[i] = i + FIRST_EXTERNAL_VECTOR;
}

- /*
- * The master interrupt is always present:
- */
- setup_x86_irq(CO_IRQ_8259, &master_action);
+ setup_irq(CO_IRQ_8259, &master_action);
+ setup_irq(2, &cascade_action);
}
-
diff -urN -X /usr/share/dontdiff linux-2.5.60.vanilla/include/asm-i386/mach-visws/irq_vectors.h linux-2.5.60/include/asm-i386/mach-visws/irq_vectors.h
--- linux-2.5.60.vanilla/include/asm-i386/mach-visws/irq_vectors.h Thu Feb 13 20:31:38 2003
+++ linux-2.5.60/include/asm-i386/mach-visws/irq_vectors.h Thu Feb 13 20:58:11 2003
@@ -47,18 +47,8 @@
#define TIMER_IRQ 0

/*
- * 16 8259A IRQ's, 208 potential APIC interrupt sources.
- * Right now the APIC is mostly only used for SMP.
- * 256 vectors is an architectural limit. (we can have
- * more than 256 devices theoretically, but they will
- * have to use shared interrupts)
- * Since vectors 0x00-0x1f are used/reserved for the CPU,
- * the usable vector space is 0x20-0xff (224 vectors)
+ *
*/
-#ifdef CONFIG_X86_IO_APIC
#define NR_IRQS 224
-#else
-#define NR_IRQS 16
-#endif

#endif /* _ASM_IRQ_VECTORS_H */
diff -urN -X /usr/share/dontdiff linux-2.5.60.vanilla/include/asm-i386/mach-visws/setup_arch_post.h linux-2.5.60/include/asm-i386/mach-visws/setup_arch_post.h
--- linux-2.5.60.vanilla/include/asm-i386/mach-visws/setup_arch_post.h Thu Feb 13 20:31:38 2003
+++ linux-2.5.60/include/asm-i386/mach-visws/setup_arch_post.h Thu Feb 13 20:42:02 2003
@@ -3,35 +3,47 @@
* This is included late in kernel/setup.c so that it can make use of all of
* the static functions. */

+#define MB (1024 * 1024)
+
+unsigned long sgivwfb_mem_phys;
+unsigned long sgivwfb_mem_size;
+
+long long mem_size __initdata = 0;
+
static inline char * __init machine_specific_memory_setup(void)
{
- char *who;
+ long long gfx_mem_size = 8 * MB;

+ mem_size = ALT_MEM_K;

- who = "BIOS-e820";
+ if (!mem_size) {
+ printk(KERN_WARNING "Bootloader didn't set memory size, upgrade it !\n");
+ mem_size = 128 * MB;
+ }

/*
- * Try to copy the BIOS-supplied E820-map.
- *
- * Otherwise fake a memory map; one section from 0k->640k,
- * the next section from 1mb->appropriate_mem_k
+ * this hardcodes the graphics memory to 8 MB
+ * it really should be sized dynamically (or at least
+ * set as a boot param)
*/
- sanitize_e820_map(E820_MAP, &E820_MAP_NR);
- if (copy_e820_map(E820_MAP, E820_MAP_NR) < 0) {
- unsigned long mem_size;
-
- /* compare results from other methods and take the greater */
- if (ALT_MEM_K < EXT_MEM_K) {
- mem_size = EXT_MEM_K;
- who = "BIOS-88";
- } else {
- mem_size = ALT_MEM_K;
- who = "BIOS-e801";
- }
-
- e820.nr_map = 0;
- add_memory_region(0, LOWMEMSIZE(), E820_RAM);
- add_memory_region(HIGH_MEMORY, mem_size << 10, E820_RAM);
- }
- return who;
+ 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;
+
+ add_memory_region(0, LOWMEMSIZE(), E820_RAM);
+ add_memory_region(HIGH_MEMORY, mem_size - sgivwfb_mem_size - HIGH_MEMORY, E820_RAM);
+ add_memory_region(sgivwfb_mem_phys, sgivwfb_mem_size, E820_RESERVED);
+
+ return "PROM";
+
+ /* Remove gcc warnings */
+ (void) sanitize_e820_map(NULL, NULL);
+ (void) copy_e820_map(NULL, 0);
}
diff -urN -X /usr/share/dontdiff linux-2.5.60.vanilla/include/asm-i386/mach-visws/do_timer.h linux-2.5.60/include/asm-i386/mach-visws/do_timer.h
--- linux-2.5.60.vanilla/include/asm-i386/mach-visws/do_timer.h Thu Feb 13 20:31:38 2003
+++ linux-2.5.60/include/asm-i386/mach-visws/do_timer.h Thu Feb 13 20:42:02 2003
@@ -1,7 +1,7 @@
/* defines for inline arch setup functions */

#include <asm/fixmap.h>
-#include <asm/cobalt.h>
+#include "cobalt.h"

static inline void do_timer_interrupt_hook(struct pt_regs *regs)
{
\
 
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  Last update: 2005-03-22 13:33    [W:0.055 / U:2.568 seconds]
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