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-rw-r--r--board/MAI/AmigaOneG3SE/i8259.c230
1 files changed, 0 insertions, 230 deletions
diff --git a/board/MAI/AmigaOneG3SE/i8259.c b/board/MAI/AmigaOneG3SE/i8259.c
deleted file mode 100644
index 34f489f7c5..0000000000
--- a/board/MAI/AmigaOneG3SE/i8259.c
+++ /dev/null
@@ -1,230 +0,0 @@
-/*
- * (C) Copyright 2002
- * John W. Linville, linville@tuxdriver.com
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-#include <common.h>
-#include "i8259.h"
-
-#undef IRQ_DEBUG
-
-#ifdef IRQ_DEBUG
-#define PRINTF(fmt,args...) printf (fmt ,##args)
-#else
-#define PRINTF(fmt,args...)
-#endif
-
-static inline unsigned char read_byte(volatile unsigned char* from)
-{
- int x;
- asm volatile ("lbz %0,%1\n eieio" : "=r" (x) : "m" (*from));
- return (unsigned char)x;
-}
-
-static inline void write_byte(volatile unsigned char *to, int x)
-{
- asm volatile ("stb %1,%0\n eieio" : "=m" (*to) : "r" (x));
-}
-
-static inline unsigned long read_long_little(volatile unsigned long *from)
-{
- unsigned long x;
- asm volatile ("lwbrx %0,0,%1\n eieio\n sync" : "=r" (x) : "r" (from), "m"(*from));
- return (unsigned long)x;
-}
-
-#ifdef out8
-#undef out8
-#endif
-
-#ifdef in8
-#undef in8
-#endif
-
-#define out8(addr, byte) write_byte(0xFE000000 | addr, byte)
-#define in8(addr) read_byte(0xFE000000 | addr)
-
-/*
- * This contains the irq mask for both 8259A irq controllers,
- */
-static char cached_imr[2] = {0xff, 0xff};
-
-#define cached_imr1 (cached_imr[0])
-#define cached_imr2 (cached_imr[1])
-
-void i8259_init(void)
-{
- char dummy;
- PRINTF("Initializing Interrupt controller\n");
- /* init master interrupt controller */
- out8(0x20, 0x11); /* 0x19); /###* Start init sequence */
- out8(0x21, 0x00); /* Vector base */
- out8(0x21, 0x04); /* edge tiggered, Cascade (slave) on IRQ2 */
- out8(0x21, 0x11); /* was: 0x01); /###* Select 8086 mode */
-
- /* init slave interrupt controller */
- out8(0xA0, 0x11); /* 0x19); /###* Start init sequence */
- out8(0xA1, 0x08); /* Vector base */
- out8(0xA1, 0x02); /* edge triggered, Cascade (slave) on IRQ2 */
- out8(0xA1, 0x11); /* was: 0x01); /###* Select 8086 mode */
-
- /* always read ISR */
- out8(0x20, 0x0B);
- dummy = in8(ISR_1);
- out8(0xA0, 0x0B);
- dummy = in8(ISR_2);
-
-/* out8(0x43, 0x30); */
-/* out8(0x40, 0); */
-/* out8(0x40, 0); */
-/* out8(0x43, 0x70); */
-/* out8(0x41, 0); */
-/* out8(0x41, 0); */
-/* out8(0x43, 0xb0); */
-/* out8(0x42, 0); */
-/* out8(0x42, 0); */
-
- /* Mask all interrupts */
- out8(IMR_2, cached_imr2);
- out8(IMR_1, cached_imr1);
-
- i8259_unmask_irq(2);
-#if 0
- {
- int i;
- for (i=0; i<16; i++)
- {
- i8259_unmask_irq(i);
- }
- }
-#endif
-}
-
-static volatile char *pci_intack = (void *)0xFEF00000;
-
-int i8259_irq(void)
-{
- int irq;
-
- irq = read_long_little(pci_intack) & 0xff;
- if (irq==7) {
- /*
- * This may be a spurious interrupt.
- *
- * Read the interrupt status register (ISR). If the most
- * significant bit is not set then there is no valid
- * interrupt.
- */
- if(~in8(0x20)&0x80) {
- irq = -1;
- }
- }
-
- return irq;
-}
-int i8259_get_irq(struct pt_regs *regs)
-{
- unsigned char irq;
-
- /*
- * Perform an interrupt acknowledge cycle on controller 1
- */
- out8(OCW3_1, 0x0C); /* prepare for poll */
- irq = in8(IPL_1) & 7;
- if (irq == 2) {
- /*
- * Interrupt is cascaded so perform interrupt
- * acknowledge on controller 2
- */
- out8(OCW3_2, 0x0C); /* prepare for poll */
- irq = (in8(IPL_2) & 7) + 8;
- if (irq == 15) {
- /*
- * This may be a spurious interrupt
- *
- * Read the interrupt status register. If the most
- * significant bit is not set then there is no valid
- * interrupt
- */
- out8(OCW3_2, 0x0b);
- if (~(in8(ISR_2) & 0x80)) {
- return -1;
- }
- }
- } else if (irq == 7) {
- /*
- * This may be a spurious interrupt
- *
- * Read the interrupt status register. If the most
- * significant bit is not set then there is no valid
- * interrupt
- */
- out8(OCW3_1, 0x0b);
- if (~(in8(ISR_1) & 0x80)) {
- return -1;
- }
- }
- return irq;
-}
-
-/*
- * Careful! The 8259A is a fragile beast, it pretty
- * much _has_ to be done exactly like this (mask it
- * first, _then_ send the EOI, and the order of EOI
- * to the two 8259s is important!
- */
-void i8259_mask_and_ack(int irq)
-{
- if (irq > 7) {
- cached_imr2 |= (1 << (irq - 8));
- in8(IMR_2); /* DUMMY */
- out8(IMR_2, cached_imr2);
- out8(OCW2_2, 0x20); /* Non-specific EOI */
- out8(OCW2_1, 0x20); /* Non-specific EOI to cascade */
- } else {
- cached_imr1 |= (1 << irq);
- in8(IMR_1); /* DUMMY */
- out8(IMR_1, cached_imr1);
- out8(OCW2_1, 0x20); /* Non-specific EOI */
- }
-}
-
-void i8259_mask_irq(int irq)
-{
- if (irq & 8) {
- cached_imr2 |= (1 << (irq & 7));
- out8(IMR_2, cached_imr2);
- } else {
- cached_imr1 |= (1 << irq);
- out8(IMR_1, cached_imr1);
- }
-}
-
-void i8259_unmask_irq(int irq)
-{
- if (irq & 8) {
- cached_imr2 &= ~(1 << (irq & 7));
- out8(IMR_2, cached_imr2);
- } else {
- cached_imr1 &= ~(1 << irq);
- out8(IMR_1, cached_imr1);
- }
-}