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AIC3: init

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This commit is contained in:
emxll 2024-08-21 15:02:58 +02:00
parent 8a122f86c4
commit 13996943cb
3 changed files with 113 additions and 13 deletions
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121
src/aic.c
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@ -33,8 +33,34 @@ static struct aic aic2 = {
},
};
static struct aic aic3 = {
.version = 3,
.regs =
{
.config = AIC3_IRQ_CFG,
},
};
struct aic *aic;
static void aic_ext_int_cfg(int node){
u32 ext_intr_config_len;
const u8 *ext_intr_config = adt_getprop(adt, node, "aic-ext-intr-cfg", &ext_intr_config_len);
if (ext_intr_config) {
printf("AIC: Configuring %d external interrupts\n", ext_intr_config_len / 3);
for (u32 i = 0; i < ext_intr_config_len; i += 3) {
u8 die = ext_intr_config[i + 1] >> 4;
u16 irq = ext_intr_config[i] | ((ext_intr_config[i + 1] & 0xf) << 8);
u8 target = ext_intr_config[i + 2];
assert(die < aic->nr_die);
assert(irq < aic->nr_irq);
mask32(aic->base + aic->regs.config + die * aic->die_stride + 4 * irq,
AIC2_IRQ_CFG_TARGET, FIELD_PREP(AIC2_IRQ_CFG_TARGET, target));
}
}
}
static int aic2_init(int node)
{
int ret = ADT_GETPROP(adt, node, "aic-iack-offset", &aic->regs.event);
@ -80,22 +106,82 @@ static int aic2_init(int node)
printf("AIC: AIC2 with %u/%u dies, %u/%u IRQs, reg_size:%05lx die_stride:%05x\n", aic->nr_die,
aic->max_die, aic->nr_irq, aic->max_irq, aic->regs.reg_size, aic->die_stride);
u32 ext_intr_config_len;
const u8 *ext_intr_config = adt_getprop(adt, node, "aic-ext-intr-cfg", &ext_intr_config_len);
if (ext_intr_config) {
printf("AIC: Configuring %d external interrupts\n", ext_intr_config_len / 3);
for (u32 i = 0; i < ext_intr_config_len; i += 3) {
u8 die = ext_intr_config[i + 1] >> 4;
u16 irq = ext_intr_config[i] | ((ext_intr_config[i + 1] & 0xf) << 8);
u8 target = ext_intr_config[i + 2];
assert(die < aic->nr_die);
assert(irq < aic->nr_irq);
mask32(aic->base + aic->regs.config + die * aic->die_stride + 4 * irq,
AIC2_IRQ_CFG_TARGET, FIELD_PREP(AIC2_IRQ_CFG_TARGET, target));
}
aic_ext_int_cfg(node);
return 0;
}
static int aic3_init(int node)
{
int ret = ADT_GETPROP(adt, node, "aic-iack-offset", &aic->regs.event);
if (ret < 0) {
printf("AIC: failed to get property aic-iack-offset\n");
return ret;
}
int maxnumirq_offset;
ret = ADT_GETPROP(adt, node, "maxnumirq-offset", &maxnumirq_offset);
if (ret < 0) {
printf("AIC: AIC3: failed to get property maxnumirq-offset\n");
return ret;
}
int max_irq_interrupt_umask = 0;
ADT_GETPROP(adt, node, "max_irq_interrupt_umask", &max_irq_interrupt_umask);
if (max_irq_interrupt_umask == 0) {
max_irq_interrupt_umask = 0xffff;
}
int maxnumirq = read32(aic->base + maxnumirq_offset);
aic->max_irq = maxnumirq & max_irq_interrupt_umask;
aic->max_die = (maxnumirq >> 0x18) & 0xf;
int cap0_offset;
ret = ADT_GETPROP(adt, node, "cap0-offset", &cap0_offset);
if (ret < 0) {
printf("AIC: AIC3: failed to get property cap0-offset\n");
return ret;
}
int cap0_max_interrupt_mask = 0;
ADT_GETPROP(adt, node, "cap0_max_interrupt_umask", &cap0_max_interrupt_mask);
if (cap0_max_interrupt_mask == 0) {
cap0_max_interrupt_mask = 0xffff;
}
int cap0 = read32(aic->base + cap0_offset);
aic->nr_irq = cap0 & cap0_max_interrupt_mask;
aic->nr_die = ((cap0 >> 0x18) & 0xf) + 1;
if (aic->max_die > AIC3_MAX_MAX_DIES) {
printf("AIC: AIC3: more max dies than supported: %u\n", aic->max_die);
return -1;
}
if (aic->max_irq > AIC_MAX_HW_NUM) {
printf("AIC: AIC3: more IRQs than supported: %u\n", aic->max_irq);
return -1;
}
const u64 start_off = aic->regs.config;
u64 off = start_off + AIC3_EXT_CFG_SECT_STRIDE; /* IRQ_CFG */
aic->regs.sw_set = off;
off += AIC3_CFG_SECT_STRIDE; /* SW_SET */
aic->regs.sw_clr = off;
off += AIC3_CFG_SECT_STRIDE; /* SW_CLR */
aic->regs.mask_set = off;
off += AIC3_CFG_SECT_STRIDE; /* MASK_SET */
aic->regs.mask_clr = off;
aic->die_stride = AIC3_DIE_STRIDE;
aic->regs.reg_size = aic->regs.event + 4;
printf("AIC: AIC3 with %u/%u dies, %u/%u IRQs, reg_size:%05lx die_stride:%05x\n", aic->nr_die,
aic->max_die, aic->nr_irq, aic->max_irq, aic->regs.reg_size, aic->die_stride);
aic_ext_int_cfg(node);
return 0;
}
@ -113,6 +199,8 @@ void aic_init(void)
aic = &aic1;
} else if (adt_is_compatible(adt, node, "aic,2")) {
aic = &aic2;
} else if (adt_is_compatible(adt, node, "aic,3")) {
aic = &aic3;
} else {
printf("AIC: Error: Unsupported version\n");
return;
@ -132,6 +220,11 @@ void aic_init(void)
int ret = aic2_init(node);
if (ret < 0)
aic = NULL;
} else if (aic->version == 3) {
printf("AIC: Version 3 @ 0x%lx\n", aic->base);
int ret = aic3_init(node);
if (ret < 0)
aic = NULL;
}
}

1
src/aic.h
View file

@ -6,6 +6,7 @@
#include "types.h"
#define AIC_MAX_DIES 4
#define AIC3_MAX_MAX_DIES 8
struct aic_regs {
uint64_t reg_size;

6
src/aic_regs.h
View file

@ -51,3 +51,9 @@
#define AIC1_MAX_IRQ 0x400
#define AIC_MAX_HW_NUM (0x80 * 32) // max_irq of the M1 Max
// Apple Interrupt Controller 3
#define AIC3_IRQ_CFG 0x10000
#define AIC3_DIE_STRIDE 0x4a00
#define AIC3_EXT_CFG_SECT_STRIDE 0x4000
#define AIC3_CFG_SECT_STRIDE 0x200