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xemu/hw/omap_intc.c
Alexander Graf 2507c12ab0 Add endianness as io mem parameter 
As stated before, devices can be little, big or native endian. The
target endianness is not of their concern, so we need to push things
down a level.

This patch adds a parameter to cpu_register_io_memory that allows a
device to choose its endianness. For now, all devices simply choose
native endian, because that's the same behavior as before.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2010-12-11 15:24:25 +00:00

599 lines
16 KiB
C
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/*
* TI OMAP interrupt controller emulation.
*
* Copyright (C) 2006-2008 Andrzej Zaborowski <balrog@zabor.org>
* Copyright (C) 2007-2008 Nokia Corporation
*
* 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 or
* (at your option) version 3 of the License.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include "hw.h"
#include "omap.h"
/* Interrupt Handlers */
struct omap_intr_handler_bank_s {
uint32_t irqs;
uint32_t inputs;
uint32_t mask;
uint32_t fiq;
uint32_t sens_edge;
uint32_t swi;
unsigned char priority[32];
};
struct omap_intr_handler_s {
qemu_irq *pins;
qemu_irq parent_intr[2];
unsigned char nbanks;
int level_only;
/* state */
uint32_t new_agr[2];
int sir_intr[2];
int autoidle;
uint32_t mask;
struct omap_intr_handler_bank_s bank[];
};
inline qemu_irq omap_inth_get_pin(struct omap_intr_handler_s *s, int n)
{
return s->pins[n];
}
static void omap_inth_sir_update(struct omap_intr_handler_s *s, int is_fiq)
{
int i, j, sir_intr, p_intr, p, f;
uint32_t level;
sir_intr = 0;
p_intr = 255;
/* Find the interrupt line with the highest dynamic priority.
* Note: 0 denotes the hightest priority.
* If all interrupts have the same priority, the default order is IRQ_N,
* IRQ_N-1,...,IRQ_0. */
for (j = 0; j < s->nbanks; ++j) {
level = s->bank[j].irqs & ~s->bank[j].mask &
(is_fiq ? s->bank[j].fiq : ~s->bank[j].fiq);
for (f = ffs(level), i = f - 1, level >>= f - 1; f; i += f,
level >>= f) {
p = s->bank[j].priority[i];
if (p <= p_intr) {
p_intr = p;
sir_intr = 32 * j + i;
}
f = ffs(level >> 1);
}
}
s->sir_intr[is_fiq] = sir_intr;
}
static inline void omap_inth_update(struct omap_intr_handler_s *s, int is_fiq)
{
int i;
uint32_t has_intr = 0;
for (i = 0; i < s->nbanks; ++i)
has_intr |= s->bank[i].irqs & ~s->bank[i].mask &
(is_fiq ? s->bank[i].fiq : ~s->bank[i].fiq);
if (s->new_agr[is_fiq] & has_intr & s->mask) {
s->new_agr[is_fiq] = 0;
omap_inth_sir_update(s, is_fiq);
qemu_set_irq(s->parent_intr[is_fiq], 1);
}
}
#define INT_FALLING_EDGE 0
#define INT_LOW_LEVEL 1
static void omap_set_intr(void *opaque, int irq, int req)
{
struct omap_intr_handler_s *ih = (struct omap_intr_handler_s *) opaque;
uint32_t rise;
struct omap_intr_handler_bank_s *bank = &ih->bank[irq >> 5];
int n = irq & 31;
if (req) {
rise = ~bank->irqs & (1 << n);
if (~bank->sens_edge & (1 << n))
rise &= ~bank->inputs;
bank->inputs |= (1 << n);
if (rise) {
bank->irqs |= rise;
omap_inth_update(ih, 0);
omap_inth_update(ih, 1);
}
} else {
rise = bank->sens_edge & bank->irqs & (1 << n);
bank->irqs &= ~rise;
bank->inputs &= ~(1 << n);
}
}
/* Simplified version with no edge detection */
static void omap_set_intr_noedge(void *opaque, int irq, int req)
{
struct omap_intr_handler_s *ih = (struct omap_intr_handler_s *) opaque;
uint32_t rise;
struct omap_intr_handler_bank_s *bank = &ih->bank[irq >> 5];
int n = irq & 31;
if (req) {
rise = ~bank->inputs & (1 << n);
if (rise) {
bank->irqs |= bank->inputs |= rise;
omap_inth_update(ih, 0);
omap_inth_update(ih, 1);
}
} else
bank->irqs = (bank->inputs &= ~(1 << n)) | bank->swi;
}
static uint32_t omap_inth_read(void *opaque, target_phys_addr_t addr)
{
struct omap_intr_handler_s *s = (struct omap_intr_handler_s *) opaque;
int i, offset = addr;
int bank_no = offset >> 8;
int line_no;
struct omap_intr_handler_bank_s *bank = &s->bank[bank_no];
offset &= 0xff;
switch (offset) {
case 0x00: /* ITR */
return bank->irqs;
case 0x04: /* MIR */
return bank->mask;
case 0x10: /* SIR_IRQ_CODE */
case 0x14: /* SIR_FIQ_CODE */
if (bank_no != 0)
break;
line_no = s->sir_intr[(offset - 0x10) >> 2];
bank = &s->bank[line_no >> 5];
i = line_no & 31;
if (((bank->sens_edge >> i) & 1) == INT_FALLING_EDGE)
bank->irqs &= ~(1 << i);
return line_no;
case 0x18: /* CONTROL_REG */
if (bank_no != 0)
break;
return 0;
case 0x1c: /* ILR0 */
case 0x20: /* ILR1 */
case 0x24: /* ILR2 */
case 0x28: /* ILR3 */
case 0x2c: /* ILR4 */
case 0x30: /* ILR5 */
case 0x34: /* ILR6 */
case 0x38: /* ILR7 */
case 0x3c: /* ILR8 */
case 0x40: /* ILR9 */
case 0x44: /* ILR10 */
case 0x48: /* ILR11 */
case 0x4c: /* ILR12 */
case 0x50: /* ILR13 */
case 0x54: /* ILR14 */
case 0x58: /* ILR15 */
case 0x5c: /* ILR16 */
case 0x60: /* ILR17 */
case 0x64: /* ILR18 */
case 0x68: /* ILR19 */
case 0x6c: /* ILR20 */
case 0x70: /* ILR21 */
case 0x74: /* ILR22 */
case 0x78: /* ILR23 */
case 0x7c: /* ILR24 */
case 0x80: /* ILR25 */
case 0x84: /* ILR26 */
case 0x88: /* ILR27 */
case 0x8c: /* ILR28 */
case 0x90: /* ILR29 */
case 0x94: /* ILR30 */
case 0x98: /* ILR31 */
i = (offset - 0x1c) >> 2;
return (bank->priority[i] << 2) |
(((bank->sens_edge >> i) & 1) << 1) |
((bank->fiq >> i) & 1);
case 0x9c: /* ISR */
return 0x00000000;
}
OMAP_BAD_REG(addr);
return 0;
}
static void omap_inth_write(void *opaque, target_phys_addr_t addr,
uint32_t value)
{
struct omap_intr_handler_s *s = (struct omap_intr_handler_s *) opaque;
int i, offset = addr;
int bank_no = offset >> 8;
struct omap_intr_handler_bank_s *bank = &s->bank[bank_no];
offset &= 0xff;
switch (offset) {
case 0x00: /* ITR */
/* Important: ignore the clearing if the IRQ is level-triggered and
the input bit is 1 */
bank->irqs &= value | (bank->inputs & bank->sens_edge);
return;
case 0x04: /* MIR */
bank->mask = value;
omap_inth_update(s, 0);
omap_inth_update(s, 1);
return;
case 0x10: /* SIR_IRQ_CODE */
case 0x14: /* SIR_FIQ_CODE */
OMAP_RO_REG(addr);
break;
case 0x18: /* CONTROL_REG */
if (bank_no != 0)
break;
if (value & 2) {
qemu_set_irq(s->parent_intr[1], 0);
s->new_agr[1] = ~0;
omap_inth_update(s, 1);
}
if (value & 1) {
qemu_set_irq(s->parent_intr[0], 0);
s->new_agr[0] = ~0;
omap_inth_update(s, 0);
}
return;
case 0x1c: /* ILR0 */
case 0x20: /* ILR1 */
case 0x24: /* ILR2 */
case 0x28: /* ILR3 */
case 0x2c: /* ILR4 */
case 0x30: /* ILR5 */
case 0x34: /* ILR6 */
case 0x38: /* ILR7 */
case 0x3c: /* ILR8 */
case 0x40: /* ILR9 */
case 0x44: /* ILR10 */
case 0x48: /* ILR11 */
case 0x4c: /* ILR12 */
case 0x50: /* ILR13 */
case 0x54: /* ILR14 */
case 0x58: /* ILR15 */
case 0x5c: /* ILR16 */
case 0x60: /* ILR17 */
case 0x64: /* ILR18 */
case 0x68: /* ILR19 */
case 0x6c: /* ILR20 */
case 0x70: /* ILR21 */
case 0x74: /* ILR22 */
case 0x78: /* ILR23 */
case 0x7c: /* ILR24 */
case 0x80: /* ILR25 */
case 0x84: /* ILR26 */
case 0x88: /* ILR27 */
case 0x8c: /* ILR28 */
case 0x90: /* ILR29 */
case 0x94: /* ILR30 */
case 0x98: /* ILR31 */
i = (offset - 0x1c) >> 2;
bank->priority[i] = (value >> 2) & 0x1f;
bank->sens_edge &= ~(1 << i);
bank->sens_edge |= ((value >> 1) & 1) << i;
bank->fiq &= ~(1 << i);
bank->fiq |= (value & 1) << i;
return;
case 0x9c: /* ISR */
for (i = 0; i < 32; i ++)
if (value & (1 << i)) {
omap_set_intr(s, 32 * bank_no + i, 1);
return;
}
return;
}
OMAP_BAD_REG(addr);
}
static CPUReadMemoryFunc * const omap_inth_readfn[] = {
omap_badwidth_read32,
omap_badwidth_read32,
omap_inth_read,
};
static CPUWriteMemoryFunc * const omap_inth_writefn[] = {
omap_inth_write,
omap_inth_write,
omap_inth_write,
};
void omap_inth_reset(struct omap_intr_handler_s *s)
{
int i;
for (i = 0; i < s->nbanks; ++i){
s->bank[i].irqs = 0x00000000;
s->bank[i].mask = 0xffffffff;
s->bank[i].sens_edge = 0x00000000;
s->bank[i].fiq = 0x00000000;
s->bank[i].inputs = 0x00000000;
s->bank[i].swi = 0x00000000;
memset(s->bank[i].priority, 0, sizeof(s->bank[i].priority));
if (s->level_only)
s->bank[i].sens_edge = 0xffffffff;
}
s->new_agr[0] = ~0;
s->new_agr[1] = ~0;
s->sir_intr[0] = 0;
s->sir_intr[1] = 0;
s->autoidle = 0;
s->mask = ~0;
qemu_set_irq(s->parent_intr[0], 0);
qemu_set_irq(s->parent_intr[1], 0);
}
struct omap_intr_handler_s *omap_inth_init(target_phys_addr_t base,
unsigned long size, unsigned char nbanks, qemu_irq **pins,
qemu_irq parent_irq, qemu_irq parent_fiq, omap_clk clk)
{
int iomemtype;
struct omap_intr_handler_s *s = (struct omap_intr_handler_s *)
qemu_mallocz(sizeof(struct omap_intr_handler_s) +
sizeof(struct omap_intr_handler_bank_s) * nbanks);
s->parent_intr[0] = parent_irq;
s->parent_intr[1] = parent_fiq;
s->nbanks = nbanks;
s->pins = qemu_allocate_irqs(omap_set_intr, s, nbanks * 32);
if (pins)
*pins = s->pins;
omap_inth_reset(s);
iomemtype = cpu_register_io_memory(omap_inth_readfn,
omap_inth_writefn, s, DEVICE_NATIVE_ENDIAN);
cpu_register_physical_memory(base, size, iomemtype);
return s;
}
static uint32_t omap2_inth_read(void *opaque, target_phys_addr_t addr)
{
struct omap_intr_handler_s *s = (struct omap_intr_handler_s *) opaque;
int offset = addr;
int bank_no, line_no;
struct omap_intr_handler_bank_s *bank = NULL;
if ((offset & 0xf80) == 0x80) {
bank_no = (offset & 0x60) >> 5;
if (bank_no < s->nbanks) {
offset &= ~0x60;
bank = &s->bank[bank_no];
}
}
switch (offset) {
case 0x00: /* INTC_REVISION */
return 0x21;
case 0x10: /* INTC_SYSCONFIG */
return (s->autoidle >> 2) & 1;
case 0x14: /* INTC_SYSSTATUS */
return 1; /* RESETDONE */
case 0x40: /* INTC_SIR_IRQ */
return s->sir_intr[0];
case 0x44: /* INTC_SIR_FIQ */
return s->sir_intr[1];
case 0x48: /* INTC_CONTROL */
return (!s->mask) << 2; /* GLOBALMASK */
case 0x4c: /* INTC_PROTECTION */
return 0;
case 0x50: /* INTC_IDLE */
return s->autoidle & 3;
/* Per-bank registers */
case 0x80: /* INTC_ITR */
return bank->inputs;
case 0x84: /* INTC_MIR */
return bank->mask;
case 0x88: /* INTC_MIR_CLEAR */
case 0x8c: /* INTC_MIR_SET */
return 0;
case 0x90: /* INTC_ISR_SET */
return bank->swi;
case 0x94: /* INTC_ISR_CLEAR */
return 0;
case 0x98: /* INTC_PENDING_IRQ */
return bank->irqs & ~bank->mask & ~bank->fiq;
case 0x9c: /* INTC_PENDING_FIQ */
return bank->irqs & ~bank->mask & bank->fiq;
/* Per-line registers */
case 0x100 ... 0x300: /* INTC_ILR */
bank_no = (offset - 0x100) >> 7;
if (bank_no > s->nbanks)
break;
bank = &s->bank[bank_no];
line_no = (offset & 0x7f) >> 2;
return (bank->priority[line_no] << 2) |
((bank->fiq >> line_no) & 1);
}
OMAP_BAD_REG(addr);
return 0;
}
static void omap2_inth_write(void *opaque, target_phys_addr_t addr,
uint32_t value)
{
struct omap_intr_handler_s *s = (struct omap_intr_handler_s *) opaque;
int offset = addr;
int bank_no, line_no;
struct omap_intr_handler_bank_s *bank = NULL;
if ((offset & 0xf80) == 0x80) {
bank_no = (offset & 0x60) >> 5;
if (bank_no < s->nbanks) {
offset &= ~0x60;
bank = &s->bank[bank_no];
}
}
switch (offset) {
case 0x10: /* INTC_SYSCONFIG */
s->autoidle &= 4;
s->autoidle |= (value & 1) << 2;
if (value & 2) /* SOFTRESET */
omap_inth_reset(s);
return;
case 0x48: /* INTC_CONTROL */
s->mask = (value & 4) ? 0 : ~0; /* GLOBALMASK */
if (value & 2) { /* NEWFIQAGR */
qemu_set_irq(s->parent_intr[1], 0);
s->new_agr[1] = ~0;
omap_inth_update(s, 1);
}
if (value & 1) { /* NEWIRQAGR */
qemu_set_irq(s->parent_intr[0], 0);
s->new_agr[0] = ~0;
omap_inth_update(s, 0);
}
return;
case 0x4c: /* INTC_PROTECTION */
/* TODO: Make a bitmap (or sizeof(char)map) of access privileges
* for every register, see Chapter 3 and 4 for privileged mode. */
if (value & 1)
fprintf(stderr, "%s: protection mode enable attempt\n",
__FUNCTION__);
return;
case 0x50: /* INTC_IDLE */
s->autoidle &= ~3;
s->autoidle |= value & 3;
return;
/* Per-bank registers */
case 0x84: /* INTC_MIR */
bank->mask = value;
omap_inth_update(s, 0);
omap_inth_update(s, 1);
return;
case 0x88: /* INTC_MIR_CLEAR */
bank->mask &= ~value;
omap_inth_update(s, 0);
omap_inth_update(s, 1);
return;
case 0x8c: /* INTC_MIR_SET */
bank->mask |= value;
return;
case 0x90: /* INTC_ISR_SET */
bank->irqs |= bank->swi |= value;
omap_inth_update(s, 0);
omap_inth_update(s, 1);
return;
case 0x94: /* INTC_ISR_CLEAR */
bank->swi &= ~value;
bank->irqs = bank->swi & bank->inputs;
return;
/* Per-line registers */
case 0x100 ... 0x300: /* INTC_ILR */
bank_no = (offset - 0x100) >> 7;
if (bank_no > s->nbanks)
break;
bank = &s->bank[bank_no];
line_no = (offset & 0x7f) >> 2;
bank->priority[line_no] = (value >> 2) & 0x3f;
bank->fiq &= ~(1 << line_no);
bank->fiq |= (value & 1) << line_no;
return;
case 0x00: /* INTC_REVISION */
case 0x14: /* INTC_SYSSTATUS */
case 0x40: /* INTC_SIR_IRQ */
case 0x44: /* INTC_SIR_FIQ */
case 0x80: /* INTC_ITR */
case 0x98: /* INTC_PENDING_IRQ */
case 0x9c: /* INTC_PENDING_FIQ */
OMAP_RO_REG(addr);
return;
}
OMAP_BAD_REG(addr);
}
static CPUReadMemoryFunc * const omap2_inth_readfn[] = {
omap_badwidth_read32,
omap_badwidth_read32,
omap2_inth_read,
};
static CPUWriteMemoryFunc * const omap2_inth_writefn[] = {
omap2_inth_write,
omap2_inth_write,
omap2_inth_write,
};
struct omap_intr_handler_s *omap2_inth_init(target_phys_addr_t base,
int size, int nbanks, qemu_irq **pins,
qemu_irq parent_irq, qemu_irq parent_fiq,
omap_clk fclk, omap_clk iclk)
{
int iomemtype;
struct omap_intr_handler_s *s = (struct omap_intr_handler_s *)
qemu_mallocz(sizeof(struct omap_intr_handler_s) +
sizeof(struct omap_intr_handler_bank_s) * nbanks);
s->parent_intr[0] = parent_irq;
s->parent_intr[1] = parent_fiq;
s->nbanks = nbanks;
s->level_only = 1;
s->pins = qemu_allocate_irqs(omap_set_intr_noedge, s, nbanks * 32);
if (pins)
*pins = s->pins;
omap_inth_reset(s);
iomemtype = cpu_register_io_memory(omap2_inth_readfn,
omap2_inth_writefn, s, DEVICE_NATIVE_ENDIAN);
cpu_register_physical_memory(base, size, iomemtype);
return s;
}
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