On 2024/9/6 下午12:49, Jason A. Donenfeld wrote:
In order to support additional channels of communication using
`-serial`, add several serial ports, up to the standard 4 generally
supported by the 8250 driver.
Signed-off-by: Jason A. Donenfeld <ja...@zx2c4.com>
---
hw/loongarch/virt.c | 24 ++++++++++++++----------
include/hw/pci-host/ls7a.h | 9 +++++----
2 files changed, 19 insertions(+), 14 deletions(-)
diff --git a/hw/loongarch/virt.c b/hw/loongarch/virt.c
index 4151fc5e0c..155678b684 100644
--- a/hw/loongarch/virt.c
+++ b/hw/loongarch/virt.c
@@ -319,10 +319,10 @@ static void fdt_add_ged_reset(LoongArchVirtMachineState
*lvms)
}
static void fdt_add_uart_node(LoongArchVirtMachineState *lvms,
- uint32_t *pch_pic_phandle)
+ uint32_t *pch_pic_phandle, hwaddr base,
+ int irq, bool chosen)
{
char *nodename;
- hwaddr base = VIRT_UART_BASE;
hwaddr size = VIRT_UART_SIZE;
MachineState *ms = MACHINE(lvms);
@@ -331,9 +331,9 @@ static void fdt_add_uart_node(LoongArchVirtMachineState *lvms,
qemu_fdt_setprop_string(ms->fdt, nodename, "compatible", "ns16550a");
qemu_fdt_setprop_cells(ms->fdt, nodename, "reg", 0x0, base, 0x0, size);
qemu_fdt_setprop_cell(ms->fdt, nodename, "clock-frequency", 100000000);
- qemu_fdt_setprop_string(ms->fdt, "/chosen", "stdout-path", nodename);
- qemu_fdt_setprop_cells(ms->fdt, nodename, "interrupts",
- VIRT_UART_IRQ - VIRT_GSI_BASE, 0x4);
+ if (chosen)
+ qemu_fdt_setprop_string(ms->fdt, "/chosen", "stdout-path", nodename);
+ qemu_fdt_setprop_cells(ms->fdt, nodename, "interrupts", irq, 0x4);
qemu_fdt_setprop_cell(ms->fdt, nodename, "interrupt-parent",
*pch_pic_phandle);
g_free(nodename);
@@ -750,11 +750,15 @@ static void virt_devices_init(DeviceState *pch_pic,
/* Add pcie node */
fdt_add_pcie_node(lvms, pch_pic_phandle, pch_msi_phandle);
- serial_mm_init(get_system_memory(), VIRT_UART_BASE, 0,
- qdev_get_gpio_in(pch_pic,
- VIRT_UART_IRQ - VIRT_GSI_BASE),
- 115200, serial_hd(0), DEVICE_LITTLE_ENDIAN);
- fdt_add_uart_node(lvms, pch_pic_phandle);
+ for (i = 0; i < VIRT_UART_COUNT; ++i) {
How about adding serial_hd(i) checking here, such as
for (i = 0; (i < VIRT_UART_COUNT) && serial_hd(i); ++i) {
+ hwaddr base = VIRT_UART_BASE + i * VIRT_UART_SIZE;
+ int irq = VIRT_UART_IRQ + i - VIRT_GSI_BASE;
+ serial_mm_init(get_system_memory(), base, 0,
+ qdev_get_gpio_in(pch_pic, irq),
+ 115200, serial_hd(VIRT_UART_COUNT - 1 - i),
is it serial_hd(i) here rather than serial_hd(VIRT_UART_COUNT - 1 - i)?
In general serial_hd(0) is default serial.
+ DEVICE_LITTLE_ENDIAN);
+ fdt_add_uart_node(lvms, pch_pic_phandle, base, irq, i == 0);
+ }
/* Network init */
pci_init_nic_devices(pci_bus, mc->default_nic);
diff --git a/include/hw/pci-host/ls7a.h b/include/hw/pci-host/ls7a.h
index cd7c9ec7bc..79d4ea8501 100644
--- a/include/hw/pci-host/ls7a.h
+++ b/include/hw/pci-host/ls7a.h
@@ -36,17 +36,18 @@
#define VIRT_PCH_PIC_IRQ_NUM 32
#define VIRT_GSI_BASE 64
#define VIRT_DEVICE_IRQS 16
+#define VIRT_UART_COUNT 4
#define VIRT_UART_IRQ (VIRT_GSI_BASE + 2)
#define VIRT_UART_BASE 0x1fe001e0
-#define VIRT_UART_SIZE 0X100
-#define VIRT_RTC_IRQ (VIRT_GSI_BASE + 3)
+#define VIRT_UART_SIZE 0x100
+#define VIRT_RTC_IRQ (VIRT_GSI_BASE + 6)
#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 (VIRT_GSI_BASE + 4)
+#define VIRT_SCI_IRQ (VIRT_GSI_BASE + 7)
#define VIRT_PLATFORM_BUS_BASEADDRESS 0x16000000
#define VIRT_PLATFORM_BUS_SIZE 0x2000000
#define VIRT_PLATFORM_BUS_NUM_IRQS 2
-#define VIRT_PLATFORM_BUS_IRQ (VIRT_GSI_BASE + 5)
+#define VIRT_PLATFORM_BUS_IRQ (VIRT_GSI_BASE + 8)
#endif
By the way, serial port for acpi table should be refreshed also, such as
diff --git a/hw/loongarch/acpi-build.c b/hw/loongarch/acpi-build.c
index 2638f87434..5bd2a9beaa 100644
--- a/hw/loongarch/acpi-build.c
+++ b/hw/loongarch/acpi-build.c
@@ -31,6 +31,7 @@
#include "hw/acpi/generic_event_device.h"
#include "hw/pci-host/gpex.h"
+#include "sysemu/sysemu.h"
#include "sysemu/tpm.h"
#include "hw/platform-bus.h"
#include "hw/acpi/aml-build.h"
@@ -252,23 +253,26 @@ struct AcpiBuildState {
MemoryRegion *linker_mr;
} AcpiBuildState;
-static void build_uart_device_aml(Aml *table)
+static void build_uart_device_aml(Aml *table, int index)
{
Aml *dev;
Aml *crs;
Aml *pkg0, *pkg1, *pkg2;
- uint32_t uart_irq = VIRT_UART_IRQ;
+ uint32_t uart_irq;
+ uint64_t base;
+ uart_irq = VIRT_UART_IRQ + index;
+ base = VIRT_UART_BASE + index * VIRT_UART_SIZE;
Aml *scope = aml_scope("_SB");
- dev = aml_device("COMA");
+ dev = aml_device("COM%d", index);
aml_append(dev, aml_name_decl("_HID", aml_string("PNP0501")));
- aml_append(dev, aml_name_decl("_UID", aml_int(0)));
+ aml_append(dev, aml_name_decl("_UID", aml_int(index)));
aml_append(dev, aml_name_decl("_CCA", aml_int(1)));
crs = aml_resource_template();
aml_append(crs,
aml_qword_memory(AML_POS_DECODE, AML_MIN_FIXED, AML_MAX_FIXED,
AML_NON_CACHEABLE, AML_READ_WRITE,
- 0, VIRT_UART_BASE, VIRT_UART_BASE +
VIRT_UART_SIZE - 1,
+ 0, base, base + VIRT_UART_SIZE - 1,
0, VIRT_UART_SIZE));
aml_append(crs, aml_interrupt(AML_CONSUMER, AML_LEVEL,
AML_ACTIVE_HIGH,
AML_SHARED, &uart_irq, 1));
@@ -405,10 +409,13 @@ build_dsdt(GArray *table_data, BIOSLinker *linker,
MachineState *machine)
LoongArchVirtMachineState *lvms = LOONGARCH_VIRT_MACHINE(machine);
AcpiTable table = { .sig = "DSDT", .rev = 1, .oem_id = lvms->oem_id,
.oem_table_id = lvms->oem_table_id };
+ int i;
acpi_table_begin(&table, table_data);
dsdt = init_aml_allocator();
- build_uart_device_aml(dsdt);
+ for (i = 0; (i < VIRT_UART_COUNT) && serial_hd(i); i++) {
+ build_uart_device_aml(dsdt, i);
+ }
build_pci_device_aml(dsdt, lvms);
build_la_ged_aml(dsdt, machine);
build_flash_aml(dsdt, lvms);
Regards
Bibo Mao
