1 files changed, 125 insertions, 0 deletions

diff --git a/include/asm-x86/visws/cobalt.h b/include/asm-x86/visws/cobalt.h
new file mode 100644
index 000000000000..995258831b7f
--- /dev/null
+++ b/include/asm-x86/visws/cobalt.h
@@ -0,0 +1,125 @@
+#ifndef __I386_SGI_COBALT_H
+#define __I386_SGI_COBALT_H
+
+#include <asm/fixmap.h>
+
+/*
+ * Cobalt SGI Visual Workstation system ASIC
+ */ 
+
+#define CO_CPU_NUM_PHYS 0x1e00
+#define CO_CPU_TAB_PHYS (CO_CPU_NUM_PHYS + 2)
+
+#define CO_CPU_MAX 4
+
+#define CO_CPU_PHYS             0xc2000000
+#define CO_APIC_PHYS            0xc4000000
+
+/* see set_fixmap() and asm/fixmap.h */
+#define CO_CPU_VADDR            (fix_to_virt(FIX_CO_CPU))
+#define CO_APIC_VADDR           (fix_to_virt(FIX_CO_APIC))
+
+/* Cobalt CPU registers -- relative to CO_CPU_VADDR, use co_cpu_*() */
+#define CO_CPU_REV              0x08
+#define CO_CPU_CTRL             0x10
+#define CO_CPU_STAT             0x20
+#define CO_CPU_TIMEVAL          0x30
+
+/* CO_CPU_CTRL bits */
+#define CO_CTRL_TIMERUN         0x04            /* 0 == disabled */
+#define CO_CTRL_TIMEMASK        0x08            /* 0 == unmasked */
+
+/* CO_CPU_STATUS bits */
+#define CO_STAT_TIMEINTR        0x02    /* (r) 1 == int pend, (w) 0 == clear */
+
+/* CO_CPU_TIMEVAL value */
+#define CO_TIME_HZ              100000000       /* Cobalt core rate */
+
+/* Cobalt APIC registers -- relative to CO_APIC_VADDR, use co_apic_*() */
+#define CO_APIC_HI(n)           (((n) * 0x10) + 4)
+#define CO_APIC_LO(n)           ((n) * 0x10)
+#define CO_APIC_ID              0x0ffc
+
+/* CO_APIC_ID bits */
+#define CO_APIC_ENABLE          0x00000100
+
+/* CO_APIC_LO bits */
+#define CO_APIC_MASK            0x00010000      /* 0 = enabled */
+#define CO_APIC_LEVEL           0x00008000      /* 0 = edge */
+
+/*
+ * Where things are physically wired to Cobalt
+ * #defines with no board _<type>_<rev>_ are common to all (thus far)
+ */
+#define CO_APIC_IDE0            4
+#define CO_APIC_IDE1            2               /* Only on 320 */
+
+#define CO_APIC_8259            12              /* serial, floppy, par-l-l */
+
+/* Lithium PCI Bridge A -- "the one with 82557 Ethernet" */
+#define CO_APIC_PCIA_BASE0      0 /* and 1 */   /* slot 0, line 0 */
+#define CO_APIC_PCIA_BASE123    5 /* and 6 */   /* slot 0, line 1 */
+
+#define CO_APIC_PIIX4_USB       7               /* this one is weird */
+
+/* Lithium PCI Bridge B -- "the one with PIIX4" */
+#define CO_APIC_PCIB_BASE0      8 /* and 9-12 *//* slot 0, line 0 */
+#define CO_APIC_PCIB_BASE123    13 /* 14.15 */  /* slot 0, line 1 */
+
+#define CO_APIC_VIDOUT0         16
+#define CO_APIC_VIDOUT1         17
+#define CO_APIC_VIDIN0          18
+#define CO_APIC_VIDIN1          19
+
+#define CO_APIC_LI_AUDIO        22
+
+#define CO_APIC_AS              24
+#define CO_APIC_RE              25
+
+#define CO_APIC_CPU             28              /* Timer and Cache interrupt */
+#define CO_APIC_NMI             29
+#define CO_APIC_LAST            CO_APIC_NMI
+
+/*
+ * This is how irqs are assigned on the Visual Workstation.
+ * Legacy devices get irq's 1-15 (system clock is 0 and is CO_APIC_CPU).
+ * All other devices (including PCI) go to Cobalt and are irq's 16 on up.
+ */
+#define CO_IRQ_APIC0    16                      /* irq of apic entry 0 */
+#define IS_CO_APIC(irq) ((irq) >= CO_IRQ_APIC0)
+#define CO_IRQ(apic)    (CO_IRQ_APIC0 + (apic)) /* apic ent to irq */
+#define CO_APIC(irq)    ((irq) - CO_IRQ_APIC0)  /* irq to apic ent */
+#define CO_IRQ_IDE0     14                      /* knowledge of... */
+#define CO_IRQ_IDE1     15                      /* ... ide driver defaults! */
+#define CO_IRQ_8259     CO_IRQ(CO_APIC_8259)
+
+#ifdef CONFIG_X86_VISWS_APIC
+static inline void co_cpu_write(unsigned long reg, unsigned long v)
+{
+        *((volatile unsigned long *)(CO_CPU_VADDR+reg))=v;
+}
+
+static inline unsigned long co_cpu_read(unsigned long reg)
+{
+        return *((volatile unsigned long *)(CO_CPU_VADDR+reg));
+}            
+             
+static inline void co_apic_write(unsigned long reg, unsigned long v)
+{
+        *((volatile unsigned long *)(CO_APIC_VADDR+reg))=v;
+}            
+             
+static inline unsigned long co_apic_read(unsigned long reg)
+{
+        return *((volatile unsigned long *)(CO_APIC_VADDR+reg));
+}
+#endif
+
+extern char visws_board_type;
+
+#define VISWS_320       0
+#define VISWS_540       1
+
+extern char visws_board_rev;
+
+#endif /* __I386_SGI_COBALT_H */