In theory gsi base can start from 0 on loongarch virt machine,
however gsi base is hard-coded in linux kernel loongarch system,
else system fails to boot.
This patch renames macro PCH_PIC_IRQ_OFFSET with VIRT_GSI_BASE,
keeps value unchanged. GSI base is common concept in acpi spec
and easy to understand.
Signed-off-by: Bibo Mao <maob...@loongson.cn>
---
hw/loongarch/acpi-build.c | 2 +-
hw/loongarch/virt.c | 8 ++++----
include/hw/pci-host/ls7a.h | 17 +++++++++--------
3 files changed, 14 insertions(+), 13 deletions(-)
diff --git a/hw/loongarch/acpi-build.c b/hw/loongarch/acpi-build.c
index c2b237736d..33e04e4b76 100644
--- a/hw/loongarch/acpi-build.c
+++ b/hw/loongarch/acpi-build.c
@@ -272,7 +272,7 @@ static void build_pci_device_aml(Aml *scope,
LoongArchMachineState *lams)
.pio.size = VIRT_PCI_IO_SIZE,
.ecam.base = VIRT_PCI_CFG_BASE,
.ecam.size = VIRT_PCI_CFG_SIZE,
- .irq = PCH_PIC_IRQ_OFFSET + VIRT_DEVICE_IRQS,
+ .irq = VIRT_GSI_BASE + VIRT_DEVICE_IRQS,
.bus = lams->pci_bus,
};
diff --git a/hw/loongarch/virt.c b/hw/loongarch/virt.c
index c8a495ea30..3754e2151f 100644
--- a/hw/loongarch/virt.c
+++ b/hw/loongarch/virt.c
@@ -432,7 +432,7 @@ static DeviceState *create_acpi_ged(DeviceState *pch_pic,
LoongArchMachineState
sysbus_mmio_map(SYS_BUS_DEVICE(dev), 2, VIRT_GED_REG_ADDR);
sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0,
- qdev_get_gpio_in(pch_pic, VIRT_SCI_IRQ -
PCH_PIC_IRQ_OFFSET));
+ qdev_get_gpio_in(pch_pic, VIRT_SCI_IRQ -
VIRT_GSI_BASE));
sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
return dev;
}
@@ -452,7 +452,7 @@ static DeviceState *create_platform_bus(DeviceState
*pch_pic)
sysbus = SYS_BUS_DEVICE(dev);
for (i = 0; i < VIRT_PLATFORM_BUS_NUM_IRQS; i++) {
- irq = VIRT_PLATFORM_BUS_IRQ - PCH_PIC_IRQ_OFFSET + i;
+ irq = VIRT_PLATFORM_BUS_IRQ - VIRT_GSI_BASE + i;
sysbus_connect_irq(sysbus, i, qdev_get_gpio_in(pch_pic, irq));
}
@@ -509,7 +509,7 @@ static void loongarch_devices_init(DeviceState *pch_pic,
LoongArchMachineState *
serial_mm_init(get_system_memory(), VIRT_UART_BASE, 0,
qdev_get_gpio_in(pch_pic,
- VIRT_UART_IRQ - PCH_PIC_IRQ_OFFSET),
+ VIRT_UART_IRQ - VIRT_GSI_BASE),
115200, serial_hd(0), DEVICE_LITTLE_ENDIAN);
fdt_add_uart_node(lams);
@@ -531,7 +531,7 @@ static void loongarch_devices_init(DeviceState *pch_pic,
LoongArchMachineState *
create_unimplemented_device("pci-dma-cfg", 0x1001041c, 0x4);
sysbus_create_simple("ls7a_rtc", VIRT_RTC_REG_BASE,
qdev_get_gpio_in(pch_pic,
- VIRT_RTC_IRQ - PCH_PIC_IRQ_OFFSET));
+ VIRT_RTC_IRQ - VIRT_GSI_BASE));
fdt_add_rtc_node(lams);
pm_mem = g_new(MemoryRegion, 1);
diff --git a/include/hw/pci-host/ls7a.h b/include/hw/pci-host/ls7a.h
index df7fa55a30..194aac905e 100644
--- a/include/hw/pci-host/ls7a.h
+++ b/include/hw/pci-host/ls7a.h
@@ -28,24 +28,25 @@
#define VIRT_PCH_MSI_ADDR_LOW 0x2FF00000UL
/*
- * According to the kernel pch irq start from 64 offset
- * 0 ~ 16 irqs used for non-pci device while 16 ~ 64 irqs
- * used for pci device.
+ * GSI_BASE is hard-coded with 64 in linux kernel, else kernel fails to boot
+ * 0 - 15 GSI for ISA devices even if there is no ISA devices
+ * 16 - 63 GSI for CPU devices such as timers/perf monitor etc
+ * 64 - GSI for external devices
*/
-#define PCH_PIC_IRQ_OFFSET 64
+#define VIRT_GSI_BASE 64
#define VIRT_DEVICE_IRQS 16
#define VIRT_PCI_IRQS 48
-#define VIRT_UART_IRQ (PCH_PIC_IRQ_OFFSET + 2)
+#define VIRT_UART_IRQ (VIRT_GSI_BASE + 2)
#define VIRT_UART_BASE 0x1fe001e0
#define VIRT_UART_SIZE 0X100
-#define VIRT_RTC_IRQ (PCH_PIC_IRQ_OFFSET + 3)
+#define VIRT_RTC_IRQ (VIRT_GSI_BASE + 3)
#define VIRT_MISC_REG_BASE (VIRT_PCH_REG_BASE + 0x00080000)
#define VIRT_RTC_REG_BASE (VIRT_MISC_REG_BASE + 0x00050100)
#define VIRT_RTC_LEN 0x100
-#define VIRT_SCI_IRQ (PCH_PIC_IRQ_OFFSET + 4)
+#define VIRT_SCI_IRQ (VIRT_GSI_BASE + 4)
#define VIRT_PLATFORM_BUS_BASEADDRESS 0x16000000
#define VIRT_PLATFORM_BUS_SIZE 0x2000000
#define VIRT_PLATFORM_BUS_NUM_IRQS 2
-#define VIRT_PLATFORM_BUS_IRQ 69
+#define VIRT_PLATFORM_BUS_IRQ (VIRT_GSI_BASE + 5)
#endif
--
2.27.0
