summaryrefslogtreecommitdiffstats
path: root/arch/alpha/kernel/sys_sable.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/alpha/kernel/sys_sable.c')
-rw-r--r--arch/alpha/kernel/sys_sable.c228
1 files changed, 132 insertions, 96 deletions
diff --git a/arch/alpha/kernel/sys_sable.c b/arch/alpha/kernel/sys_sable.c
index 53afe259b..e2a69b5c7 100644
--- a/arch/alpha/kernel/sys_sable.c
+++ b/arch/alpha/kernel/sys_sable.c
@@ -26,7 +26,7 @@
#include <asm/core_t2.h>
#include "proto.h"
-#include <asm/hw_irq.h>
+#include "irq_impl.h"
#include "pci_impl.h"
#include "machvec_impl.h"
@@ -38,15 +38,43 @@
* 0-7 (char at 536)
* 8-15 (char at 53a)
* 16-23 (char at 53c)
+ *
+ * Summary Registers (536/53a/53c):
+ *
+ * Bit Meaning Kernel IRQ
+ *------------------------------------------
+ * 0 PCI slot 0 34
+ * 1 NCR810 (builtin) 33
+ * 2 TULIP (builtin) 32
+ * 3 mouse 12
+ * 4 PCI slot 1 35
+ * 5 PCI slot 2 36
+ * 6 keyboard 1
+ * 7 floppy 6
+ * 8 COM2 3
+ * 9 parallel port 7
+ *10 EISA irq 3 -
+ *11 EISA irq 4 -
+ *12 EISA irq 5 5
+ *13 EISA irq 6 -
+ *14 EISA irq 7 -
+ *15 COM1 4
+ *16 EISA irq 9 9
+ *17 EISA irq 10 10
+ *18 EISA irq 11 11
+ *19 EISA irq 12 -
+ *20 EISA irq 13 -
+ *21 EISA irq 14 14
+ *22 NC 15
+ *23 IIC -
*/
-/* Note that the vector reported by the SRM PALcode corresponds to the
- interrupt mask bits, but we have to manage via more normal IRQs. */
-
static struct
{
char irq_to_mask[40];
char mask_to_irq[40];
+
+ /* Note mask bit is true for DISABLED irqs. */
unsigned long shadow_mask;
} sable_irq_swizzle = {
{
@@ -54,61 +82,103 @@ static struct
-1, 16, 17, 18, 3, -1, 21, 22, /* pseudo PIC 8-15 */
-1, -1, -1, -1, -1, -1, -1, -1, /* pseudo EISA 0-7 */
-1, -1, -1, -1, -1, -1, -1, -1, /* pseudo EISA 8-15 */
- 2, 1, 0, 4, 5, -1, -1, -1, /* pseudo PCI */
+ 2, 1, 0, 4, 5, -1, -1, -1, /* pseudo PCI */
},
{
34, 33, 32, 12, 35, 36, 1, 6, /* mask 0-7 */
- 3, 7, -1, -1, 5, -1, -1, 4, /* mask 8-15 */
- 9, 10, 11, -1, -1, 14, 15, -1, /* mask 16-23 */
+ 3, 7, -1, -1, 5, -1, -1, 4, /* mask 8-15 */
+ 9, 10, 11, -1, -1, 14, 15, -1, /* mask 16-23 */
},
- 0
+ -1
};
+static inline void
+sable_update_irq_hw(unsigned long bit, unsigned long mask)
+{
+ int port = 0x536;
+
+ if (bit >= 16) {
+ port = 0x53d;
+ mask >>= 16;
+ } else if (bit >= 8) {
+ port = 0x53b;
+ mask >>= 8;
+ }
-static void
-sable_update_irq_hw(unsigned long irq, unsigned long unused_mask, int unmask_p)
+ outb(mask, port);
+}
+
+static inline void
+sable_ack_irq_hw(unsigned long bit)
+{
+ int port, val1, val2;
+
+ if (bit >= 16) {
+ port = 0x53c;
+ val1 = 0xE0 | (bit - 16);
+ val2 = 0xE0 | 4;
+ } else if (bit >= 8) {
+ port = 0x53a;
+ val1 = 0xE0 | (bit - 8);
+ val2 = 0xE0 | 2;
+ } else {
+ port = 0x536;
+ val1 = 0xE0 | (bit - 0);
+ val2 = 0xE0 | 1;
+ }
+
+ outb(val1, port); /* ack the slave */
+ outb(val2, 0x534); /* ack the master */
+}
+
+static inline void
+sable_enable_irq(unsigned int irq)
{
unsigned long bit, mask;
- /* The "irq" argument is really the irq, but we need it to
- be the mask bit number. Convert it now. */
-
- irq = sable_irq_swizzle.irq_to_mask[irq];
- bit = 1UL << irq;
- mask = sable_irq_swizzle.shadow_mask | bit;
- if (unmask_p)
- mask &= ~bit;
- sable_irq_swizzle.shadow_mask = mask;
-
- /* The "irq" argument is now really the mask bit number. */
- if (irq <= 7)
- outb(mask, 0x537);
- else if (irq <= 15)
- outb(mask >> 8, 0x53b);
- else
- outb(mask >> 16, 0x53d);
+ bit = sable_irq_swizzle.irq_to_mask[irq];
+ mask = sable_irq_swizzle.shadow_mask &= ~(1UL << bit);
+ sable_update_irq_hw(bit, mask);
}
static void
-sable_ack_irq(unsigned long irq)
+sable_disable_irq(unsigned int irq)
{
- /* Note that the "irq" here is really the mask bit number */
- switch (irq) {
- case 0 ... 7:
- outb(0xE0 | (irq - 0), 0x536);
- outb(0xE0 | 1, 0x534); /* slave 0 */
- break;
- case 8 ... 15:
- outb(0xE0 | (irq - 8), 0x53a);
- outb(0xE0 | 3, 0x534); /* slave 1 */
- break;
- case 16 ... 24:
- outb(0xE0 | (irq - 16), 0x53c);
- outb(0xE0 | 4, 0x534); /* slave 2 */
- break;
- }
+ unsigned long bit, mask;
+
+ bit = sable_irq_swizzle.irq_to_mask[irq];
+ mask = sable_irq_swizzle.shadow_mask |= 1UL << bit;
+ sable_update_irq_hw(bit, mask);
}
+static unsigned int
+sable_startup_irq(unsigned int irq)
+{
+ sable_enable_irq(irq);
+ return 0;
+}
+
+static void
+sable_mask_and_ack_irq(unsigned int irq)
+{
+ unsigned long bit, mask;
+
+ bit = sable_irq_swizzle.irq_to_mask[irq];
+ mask = sable_irq_swizzle.shadow_mask |= 1UL << bit;
+ sable_update_irq_hw(bit, mask);
+ sable_ack_irq_hw(bit);
+}
+
+static struct hw_interrupt_type sable_irq_type = {
+ typename: "SABLE",
+ startup: sable_startup_irq,
+ shutdown: sable_disable_irq,
+ enable: sable_enable_irq,
+ disable: sable_disable_irq,
+ ack: sable_mask_and_ack_irq,
+ end: sable_enable_irq,
+};
+
static void
sable_srm_device_interrupt(unsigned long vector, struct pt_regs * regs)
{
@@ -116,64 +186,36 @@ sable_srm_device_interrupt(unsigned long vector, struct pt_regs * regs)
to the interrupt mask bits, but we have to manage via more
normal IRQs. */
- int irq, ack;
-
- ack = irq = (vector - 0x800) >> 4;
-
- irq = sable_irq_swizzle.mask_to_irq[(ack)];
-#if 0
- if (irq == 5 || irq == 9 || irq == 10 || irq == 11 ||
- irq == 14 || irq == 15)
- printk("srm_device_interrupt: vector=0x%lx ack=0x%x"
- " irq=0x%x\n", vector, ack, irq);
-#endif
+ int bit, irq;
- handle_irq(irq, ack, regs);
+ bit = (vector - 0x800) >> 4;
+ irq = sable_irq_swizzle.mask_to_irq[bit];
+ handle_irq(irq, regs);
}
static void __init
sable_init_irq(void)
{
- STANDARD_INIT_IRQ_PROLOG;
+ long i;
- outb(alpha_irq_mask , 0x537); /* slave 0 */
- outb(alpha_irq_mask >> 8, 0x53b); /* slave 1 */
- outb(alpha_irq_mask >> 16, 0x53d); /* slave 2 */
- outb(0x44, 0x535); /* enable cascades in master */
+ outb(-1, 0x537); /* slave 0 */
+ outb(-1, 0x53b); /* slave 1 */
+ outb(-1, 0x53d); /* slave 2 */
+ outb(0x44, 0x535); /* enable cascades in master */
+
+ for (i = 0; i < 40; ++i) {
+ irq_desc[i].status = IRQ_DISABLED;
+ irq_desc[i].handler = &sable_irq_type;
+ }
+
+ init_rtc_irq();
+ common_init_isa_dma();
}
/*
* PCI Fixup configuration for ALPHA SABLE (2100) - 2100A is different ??
*
- * Summary Registers (536/53a/53c):
- * Bit Meaning
- *-----------------
- * 0 PCI slot 0
- * 1 NCR810 (builtin)
- * 2 TULIP (builtin)
- * 3 mouse
- * 4 PCI slot 1
- * 5 PCI slot 2
- * 6 keyboard
- * 7 floppy
- * 8 COM2
- * 9 parallel port
- *10 EISA irq 3
- *11 EISA irq 4
- *12 EISA irq 5
- *13 EISA irq 6
- *14 EISA irq 7
- *15 COM1
- *16 EISA irq 9
- *17 EISA irq 10
- *18 EISA irq 11
- *19 EISA irq 12
- *20 EISA irq 13
- *21 EISA irq 14
- *22 NC
- *23 IIC
- *
* The device to slot mapping looks like:
*
* Slot Device
@@ -239,14 +281,11 @@ struct alpha_machine_vector sable_mv __initmv = {
min_mem_address: DEFAULT_MEM_BASE,
nr_irqs: 40,
- irq_probe_mask: _PROBE_MASK(40),
- update_irq_hw: sable_update_irq_hw,
- ack_irq: sable_ack_irq,
device_interrupt: sable_srm_device_interrupt,
init_arch: t2_init_arch,
init_irq: sable_init_irq,
- init_pit: common_init_pit,
+ init_rtc: common_init_rtc,
init_pci: common_init_pci,
kill_arch: NULL,
pci_map_irq: sable_map_irq,
@@ -274,14 +313,11 @@ struct alpha_machine_vector sable_gamma_mv __initmv = {
min_mem_address: DEFAULT_MEM_BASE,
nr_irqs: 40,
- irq_probe_mask: _PROBE_MASK(40),
- update_irq_hw: sable_update_irq_hw,
- ack_irq: sable_ack_irq,
device_interrupt: sable_srm_device_interrupt,
init_arch: t2_init_arch,
init_irq: sable_init_irq,
- init_pit: common_init_pit,
+ init_rtc: common_init_rtc,
init_pci: common_init_pci,
pci_map_irq: sable_map_irq,
pci_swizzle: common_swizzle,
generated by cgit v1.2.3 (git 2.25.1) at 2024-09-20 00:02:41 +0000