[PULL 36/46] hw/arm/aspeed_ast27x0.c Support AST2700 A1 GIC Interrupt Mapping

["Cédric Le Goater" <clg@redhat.com>]

From: Jamin Lin <jamin_lin@aspeedtech.com>

Currently, these IRQ tables support from GIC 128 - 136 for AST2700 A0.
These IRQ tables can be reused for AST2700 A1 from GIC 192 - 197.
Updates the interrupt mapping to include support for AST2700 A1 by extending
the existing mappings to the new GIC range.

Signed-off-by: Jamin Lin <jamin_lin@aspeedtech.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Link: https://lore.kernel.org/qemu-devel/20250307035945.3698802-20-jamin_lin@aspeedtech.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
 hw/arm/aspeed_ast27x0.c | 77 ++++++++++++++++++++++++++---------------
 1 file changed, 50 insertions(+), 27 deletions(-)

diff --git a/hw/arm/aspeed_ast27x0.c b/hw/arm/aspeed_ast27x0.c
index 3cb95210a06f..9e5f4a208453 100644
--- a/hw/arm/aspeed_ast27x0.c
+++ b/hw/arm/aspeed_ast27x0.c
@@ -120,21 +120,27 @@ static const int aspeed_soc_ast2700a0_irqmap[] = {
 };
 
 /* GICINT 128 */
-static const int aspeed_soc_ast2700_gic128_intcmap[] = {
+/* GICINT 192 */
+static const int ast2700_gic128_gic192_intcmap[] = {
     [ASPEED_DEV_LPC]       = 0,
     [ASPEED_DEV_IBT]       = 2,
     [ASPEED_DEV_KCS]       = 4,
 };
 
+/* GICINT 129 */
+/* GICINT 193 */
+
 /* GICINT 130 */
-static const int aspeed_soc_ast2700_gic130_intcmap[] = {
+/* GICINT 194 */
+static const int ast2700_gic130_gic194_intcmap[] = {
     [ASPEED_DEV_I2C]        = 0,
     [ASPEED_DEV_ADC]        = 16,
     [ASPEED_DEV_GPIO]       = 18,
 };
 
 /* GICINT 131 */
-static const int aspeed_soc_ast2700_gic131_intcmap[] = {
+/* GICINT 195 */
+static const int ast2700_gic131_gic195_intcmap[] = {
     [ASPEED_DEV_I3C]       = 0,
     [ASPEED_DEV_WDT]       = 16,
     [ASPEED_DEV_FMC]       = 25,
@@ -142,7 +148,8 @@ static const int aspeed_soc_ast2700_gic131_intcmap[] = {
 };
 
 /* GICINT 132 */
-static const int aspeed_soc_ast2700_gic132_intcmap[] = {
+/* GICINT 196 */
+static const int ast2700_gic132_gic196_intcmap[] = {
     [ASPEED_DEV_ETH1]      = 0,
     [ASPEED_DEV_ETH2]      = 1,
     [ASPEED_DEV_ETH3]      = 2,
@@ -161,24 +168,26 @@ static const int aspeed_soc_ast2700_gic132_intcmap[] = {
 };
 
 /* GICINT 133 */
-static const int aspeed_soc_ast2700_gic133_intcmap[] = {
+/* GICINT 197 */
+static const int ast2700_gic133_gic197_intcmap[] = {
     [ASPEED_DEV_SDHCI]     = 1,
     [ASPEED_DEV_PECI]      = 4,
 };
 
 /* GICINT 128 ~ 136 */
+/* GICINT 192 ~ 201 */
 struct gic_intc_irq_info {
     int irq;
     const int *ptr;
 };
 
-static const struct gic_intc_irq_info aspeed_soc_ast2700_gic_intcmap[] = {
-    {128,  aspeed_soc_ast2700_gic128_intcmap},
+static const struct gic_intc_irq_info ast2700_gic_intcmap[] = {
+    {128,  ast2700_gic128_gic192_intcmap},
     {129,  NULL},
-    {130,  aspeed_soc_ast2700_gic130_intcmap},
-    {131,  aspeed_soc_ast2700_gic131_intcmap},
-    {132,  aspeed_soc_ast2700_gic132_intcmap},
-    {133,  aspeed_soc_ast2700_gic133_intcmap},
+    {130,  ast2700_gic130_gic194_intcmap},
+    {131,  ast2700_gic131_gic195_intcmap},
+    {132,  ast2700_gic132_gic196_intcmap},
+    {133,  ast2700_gic133_gic197_intcmap},
     {134,  NULL},
     {135,  NULL},
     {136,  NULL},
@@ -190,11 +199,11 @@ static qemu_irq aspeed_soc_ast2700_get_irq(AspeedSoCState *s, int dev)
     AspeedSoCClass *sc = ASPEED_SOC_GET_CLASS(s);
     int i;
 
-    for (i = 0; i < ARRAY_SIZE(aspeed_soc_ast2700_gic_intcmap); i++) {
-        if (sc->irqmap[dev] == aspeed_soc_ast2700_gic_intcmap[i].irq) {
-            assert(aspeed_soc_ast2700_gic_intcmap[i].ptr);
+    for (i = 0; i < ARRAY_SIZE(ast2700_gic_intcmap); i++) {
+        if (sc->irqmap[dev] == ast2700_gic_intcmap[i].irq) {
+            assert(ast2700_gic_intcmap[i].ptr);
             return qdev_get_gpio_in(DEVICE(&a->intc.orgates[i]),
-                aspeed_soc_ast2700_gic_intcmap[i].ptr[dev]);
+                ast2700_gic_intcmap[i].ptr[dev]);
         }
     }
 
@@ -208,16 +217,17 @@ static qemu_irq aspeed_soc_ast2700_get_irq_index(AspeedSoCState *s, int dev,
     AspeedSoCClass *sc = ASPEED_SOC_GET_CLASS(s);
     int i;
 
-    for (i = 0; i < ARRAY_SIZE(aspeed_soc_ast2700_gic_intcmap); i++) {
-        if (sc->irqmap[dev] == aspeed_soc_ast2700_gic_intcmap[i].irq) {
-            assert(aspeed_soc_ast2700_gic_intcmap[i].ptr);
+    for (i = 0; i < ARRAY_SIZE(ast2700_gic_intcmap); i++) {
+        if (sc->irqmap[dev] == ast2700_gic_intcmap[i].irq) {
+            assert(ast2700_gic_intcmap[i].ptr);
             return qdev_get_gpio_in(DEVICE(&a->intc.orgates[i]),
-                aspeed_soc_ast2700_gic_intcmap[i].ptr[dev] + index);
+                                    ast2700_gic_intcmap[i].ptr[dev] + index);
         }
     }
 
     /*
-     * Invalid orgate index, device irq should be 128 to 136.
+     * Invalid OR gate index, device IRQ should be between 128 to 136
+     * and 192 to 201.
      */
     g_assert_not_reached();
 }
@@ -534,17 +544,18 @@ static void aspeed_soc_ast2700_realize(DeviceState *dev, Error **errp)
     aspeed_mmio_map(s, SYS_BUS_DEVICE(&a->intc), 0,
                     sc->memmap[ASPEED_DEV_INTC]);
 
-    /* source orgates -> INTC */
+    /* irq sources -> orgates -> INTC */
     for (i = 0; i < ic->num_inpins; i++) {
         qdev_connect_gpio_out(DEVICE(&a->intc.orgates[i]), 0,
-                                qdev_get_gpio_in(DEVICE(&a->intc), i));
+                              qdev_get_gpio_in(DEVICE(&a->intc), i));
     }
 
+    /* INTC -> GIC192 - GIC201 */
     /* INTC -> GIC128 - GIC136 */
     for (i = 0; i < ic->num_outpins; i++) {
         sysbus_connect_irq(SYS_BUS_DEVICE(&a->intc), i,
                            qdev_get_gpio_in(DEVICE(&a->gic),
-                                aspeed_soc_ast2700_gic_intcmap[i].irq));
+                                            ast2700_gic_intcmap[i].irq));
     }
 
     /* SRAM */
@@ -695,10 +706,22 @@ static void aspeed_soc_ast2700_realize(DeviceState *dev, Error **errp)
     for (i = 0; i < ASPEED_I2C_GET_CLASS(&s->i2c)->num_busses; i++) {
         /*
          * The AST2700 I2C controller has one source INTC per bus.
-         * I2C buses interrupt are connected to GICINT130_INTC
-         * from bit 0 to bit 15.
-         * I2C bus 0 is connected to GICINT130_INTC at bit 0.
-         * I2C bus 15 is connected to GICINT130_INTC at bit 15.
+         *
+         * For AST2700 A0:
+         * I2C bus interrupts are connected to the OR gate from bit 0 to bit
+         * 15, and the OR gate output pin is connected to the input pin of
+         * GICINT130 of INTC (CPU Die). Then, the output pin is connected to
+         * the GIC.
+         *
+         * For AST2700 A1:
+         * I2C bus interrupts are connected to the OR gate from bit 0 to bit
+         * 15, and the OR gate output pin is connected to the input pin of
+         * GICINT194 of INTCIO (IO Die). Then, the output pin is connected
+         * to the INTC (CPU Die) input pin, and its output pin is connected
+         * to the GIC.
+         *
+         * I2C bus 0 is connected to the OR gate at bit 0.
+         * I2C bus 15 is connected to the OR gate at bit 15.
          */
         irq = aspeed_soc_ast2700_get_irq_index(s, ASPEED_DEV_I2C, i);
         sysbus_connect_irq(SYS_BUS_DEVICE(&s->i2c.busses[i]), 0, irq);
-- 
2.48.1