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linux/arch/alpha/kernel/sys_rx164.c

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Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/*
* linux/arch/alpha/kernel/sys_rx164.c
*
* Copyright (C) 1995 David A Rusling
* Copyright (C) 1996 Jay A Estabrook
* Copyright (C) 1998, 1999 Richard Henderson
*
* Code supporting the RX164 (PCA56+POLARIS).
*/
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/mm.h>
#include <linux/sched.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/bitops.h>
#include <asm/ptrace.h>
#include <asm/system.h>
#include <asm/dma.h>
#include <asm/irq.h>
#include <asm/mmu_context.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/core_polaris.h>
#include <asm/tlbflush.h>
#include "proto.h"
#include "irq_impl.h"
#include "pci_impl.h"
#include "machvec_impl.h"
/* Note mask bit is true for ENABLED irqs. */
static unsigned long cached_irq_mask;
static inline void
rx164_update_irq_hw(unsigned long mask)
{
volatile unsigned int *irq_mask;
irq_mask = (void *)(POLARIS_DENSE_CONFIG_BASE + 0x74);
*irq_mask = mask;
mb();
*irq_mask;
}
static inline void
rx164_enable_irq(unsigned int irq)
{
rx164_update_irq_hw(cached_irq_mask |= 1UL << (irq - 16));
}
static void
rx164_disable_irq(unsigned int irq)
{
rx164_update_irq_hw(cached_irq_mask &= ~(1UL << (irq - 16)));
}
static unsigned int
rx164_startup_irq(unsigned int irq)
{
rx164_enable_irq(irq);
return 0;
}
static void
rx164_end_irq(unsigned int irq)
{
if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
rx164_enable_irq(irq);
}
alpha: remove obsolete hw_interrupt_type The defines and typedefs (hw_interrupt_type, no_irq_type, irq_desc_t) have been kept around for migration reasons. After more than two years it's time to remove them finally. This patch cleans up one of the remaining users. When all such patches hit mainline we can remove the defines and typedefs finally. Impact: cleanup Convert the last remaining users to struct irq_chip and remove the define. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Richard Henderson <rth@twiddle.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-17 06:33:25 +08:00
static struct irq_chip rx164_irq_type = {
alpha: Fixup last users of irq_chip->typename The typename member of struct irq_chip was kept for migration purposes and is obsolete since more than 2 years. Fix up the leftovers. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Richard Henderson <rth@twiddle.net> Cc: linux-alpha@vger.kernel.org Signed-off-by: Matt Turner <mattst88@gmail.com>
2009-12-01 11:51:31 +08:00
.name = "RX164",
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
.startup = rx164_startup_irq,
.shutdown = rx164_disable_irq,
.enable = rx164_enable_irq,
.disable = rx164_disable_irq,
.ack = rx164_disable_irq,
.end = rx164_end_irq,
};
static void
[PATCH] alpha pt_regs cleanups: device_interrupt callers of ->device_interrupt() do set_irq_regs() now; pt_regs argument removed, remaining uses of regs in instances of ->device_interrupt() are switched to get_irq_regs() and will be gone in the next patch. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-08 21:36:08 +08:00
rx164_device_interrupt(unsigned long vector)
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
{
unsigned long pld;
volatile unsigned int *dirr;
long i;
/* Read the interrupt summary register. On Polaris, this is
the DIRR register in PCI config space (offset 0x84). */
dirr = (void *)(POLARIS_DENSE_CONFIG_BASE + 0x84);
pld = *dirr;
/*
* Now for every possible bit set, work through them and call
* the appropriate interrupt handler.
*/
while (pld) {
i = ffz(~pld);
pld &= pld - 1; /* clear least bit set */
if (i == 20) {
[PATCH] alpha pt_regs cleanups: handle_irq() isa_no_iack_sc_device_interrupt() always gets get_irq_regs() as argument; kill that argument. All but two callers of handle_irq() pass get_irq_regs() as argument; convert the remaining two, kill set_irq_regs() inside handle_irq(). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-08 21:37:32 +08:00
isa_no_iack_sc_device_interrupt(vector);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
} else {
[PATCH] alpha pt_regs cleanups: handle_irq() isa_no_iack_sc_device_interrupt() always gets get_irq_regs() as argument; kill that argument. All but two callers of handle_irq() pass get_irq_regs() as argument; convert the remaining two, kill set_irq_regs() inside handle_irq(). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-08 21:37:32 +08:00
handle_irq(16+i);
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
}
}
static void __init
rx164_init_irq(void)
{
long i;
rx164_update_irq_hw(0);
for (i = 16; i < 40; ++i) {
irq_desc[i].status = IRQ_DISABLED | IRQ_LEVEL;
[PATCH] genirq: rename desc->handler to desc->chip This patch-queue improves the generic IRQ layer to be truly generic, by adding various abstractions and features to it, without impacting existing functionality. While the queue can be best described as "fix and improve everything in the generic IRQ layer that we could think of", and thus it consists of many smaller features and lots of cleanups, the one feature that stands out most is the new 'irq chip' abstraction. The irq-chip abstraction is about describing and coding and IRQ controller driver by mapping its raw hardware capabilities [and quirks, if needed] in a straightforward way, without having to think about "IRQ flow" (level/edge/etc.) type of details. This stands in contrast with the current 'irq-type' model of genirq architectures, which 'mixes' raw hardware capabilities with 'flow' details. The patchset supports both types of irq controller designs at once, and converts i386 and x86_64 to the new irq-chip design. As a bonus side-effect of the irq-chip approach, chained interrupt controllers (master/slave PIC constructs, etc.) are now supported by design as well. The end result of this patchset intends to be simpler architecture-level code and more consolidation between architectures. We reused many bits of code and many concepts from Russell King's ARM IRQ layer, the merging of which was one of the motivations for this patchset. This patch: rename desc->handler to desc->chip. Originally i did not want to do this, because it's a big patch. But having both "desc->handler", "desc->handle_irq" and "action->handler" caused a large degree of confusion and made the code appear alot less clean than it truly is. I have also attempted a dual approach as well by introducing a desc->chip alias - but that just wasnt robust enough and broke frequently. So lets get over with this quickly. The conversion was done automatically via scripts and converts all the code in the kernel. This renaming patch is the first one amongst the patches, so that the remaining patches can stay flexible and can be merged and split up without having some big monolithic patch act as a merge barrier. [akpm@osdl.org: build fix] [akpm@osdl.org: another build fix] Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-29 17:24:36 +08:00
irq_desc[i].chip = &rx164_irq_type;
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
}
init_i8259a_irqs();
common_init_isa_dma();
setup_irq(16+20, &isa_cascade_irqaction);
}
/*
* The RX164 changed its interrupt routing between pass1 and pass2...
*
* PASS1:
*
* Slot IDSEL INTA INTB INTC INTD
* 0 6 5 10 15 20
* 1 7 4 9 14 19
* 2 5 3 8 13 18
* 3 9 2 7 12 17
* 4 10 1 6 11 16
*
* PASS2:
* Slot IDSEL INTA INTB INTC INTD
* 0 5 1 7 12 17
* 1 6 2 8 13 18
* 2 8 3 9 14 19
* 3 9 4 10 15 20
* 4 10 5 11 16 6
*
*/
/*
* IdSel
* 5 32 bit PCI option slot 0
* 6 64 bit PCI option slot 1
* 7 PCI-ISA bridge
* 7 64 bit PCI option slot 2
* 9 32 bit PCI option slot 3
* 10 PCI-PCI bridge
*
*/
static int __init
rx164_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
{
#if 0
static char irq_tab_pass1[6][5] __initdata = {
/*INT INTA INTB INTC INTD */
{ 16+3, 16+3, 16+8, 16+13, 16+18}, /* IdSel 5, slot 2 */
{ 16+5, 16+5, 16+10, 16+15, 16+20}, /* IdSel 6, slot 0 */
{ 16+4, 16+4, 16+9, 16+14, 16+19}, /* IdSel 7, slot 1 */
{ -1, -1, -1, -1, -1}, /* IdSel 8, PCI/ISA bridge */
{ 16+2, 16+2, 16+7, 16+12, 16+17}, /* IdSel 9, slot 3 */
{ 16+1, 16+1, 16+6, 16+11, 16+16}, /* IdSel 10, slot 4 */
};
#else
static char irq_tab[6][5] __initdata = {
/*INT INTA INTB INTC INTD */
{ 16+0, 16+0, 16+6, 16+11, 16+16}, /* IdSel 5, slot 0 */
{ 16+1, 16+1, 16+7, 16+12, 16+17}, /* IdSel 6, slot 1 */
{ -1, -1, -1, -1, -1}, /* IdSel 7, PCI/ISA bridge */
{ 16+2, 16+2, 16+8, 16+13, 16+18}, /* IdSel 8, slot 2 */
{ 16+3, 16+3, 16+9, 16+14, 16+19}, /* IdSel 9, slot 3 */
{ 16+4, 16+4, 16+10, 16+15, 16+5}, /* IdSel 10, PCI-PCI */
};
#endif
const long min_idsel = 5, max_idsel = 10, irqs_per_slot = 5;
/* JRP - Need to figure out how to distinguish pass1 from pass2,
and use the correct table. */
return COMMON_TABLE_LOOKUP;
}
/*
* The System Vector
*/
struct alpha_machine_vector rx164_mv __initmv = {
.vector_name = "RX164",
DO_EV5_MMU,
DO_DEFAULT_RTC,
DO_POLARIS_IO,
.machine_check = polaris_machine_check,
.max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS,
.min_io_address = DEFAULT_IO_BASE,
.min_mem_address = DEFAULT_MEM_BASE,
.nr_irqs = 40,
.device_interrupt = rx164_device_interrupt,
.init_arch = polaris_init_arch,
.init_irq = rx164_init_irq,
.init_rtc = common_init_rtc,
.init_pci = common_init_pci,
.kill_arch = NULL,
.pci_map_irq = rx164_map_irq,
.pci_swizzle = common_swizzle,
};
ALIAS_MV(rx164)