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[Qemu-arm] [PATCH 2/3] hw/arm/virt: Add another UART to the virt board
From: |
Peter Maydell |
Subject: |
[Qemu-arm] [PATCH 2/3] hw/arm/virt: Add another UART to the virt board |
Date: |
Fri, 8 Dec 2017 15:02:07 +0000 |
Currently we only provide one non-secure UART on the virt
board. This is OK for most purposes, but there are some
use cases where having a second UART would be useful (like
bare-metal testing where you don't really want to have to
probe and set up a PCI device just to have a second comms
channel).
Add a second NS UART to the virt board. This will be the
second serial device if 'secure=no' (the default), and the
third serial device if 'secure=yes'.
Signed-off-by: Peter Maydell <address@hidden>
---
include/hw/arm/virt.h | 2 ++
hw/arm/virt.c | 19 ++++++++++++++++---
2 files changed, 18 insertions(+), 3 deletions(-)
diff --git a/include/hw/arm/virt.h b/include/hw/arm/virt.h
index 33b0ff3..685009a 100644
--- a/include/hw/arm/virt.h
+++ b/include/hw/arm/virt.h
@@ -72,6 +72,7 @@ enum {
VIRT_GPIO,
VIRT_SECURE_UART,
VIRT_SECURE_MEM,
+ VIRT_UART_2,
};
typedef struct MemMapEntry {
@@ -85,6 +86,7 @@ typedef struct {
bool no_its;
bool no_pmu;
bool claim_edge_triggered_timers;
+ bool no_second_uart;
} VirtMachineClass;
typedef struct {
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 543f9bd..e234f55 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -139,6 +139,7 @@ static const MemMapEntry a15memmap[] = {
[VIRT_FW_CFG] = { 0x09020000, 0x00000018 },
[VIRT_GPIO] = { 0x09030000, 0x00001000 },
[VIRT_SECURE_UART] = { 0x09040000, 0x00001000 },
+ [VIRT_UART_2] = { 0x09050000, 0x00001000 },
[VIRT_MMIO] = { 0x0a000000, 0x00000200 },
/* ...repeating for a total of NUM_VIRTIO_TRANSPORTS, each of that size */
[VIRT_PLATFORM_BUS] = { 0x0c000000, 0x02000000 },
@@ -157,6 +158,7 @@ static const int a15irqmap[] = {
[VIRT_PCIE] = 3, /* ... to 6 */
[VIRT_GPIO] = 7,
[VIRT_SECURE_UART] = 8,
+ [VIRT_UART_2] = 9,
[VIRT_MMIO] = 16, /* ...to 16 + NUM_VIRTIO_TRANSPORTS - 1 */
[VIRT_GIC_V2M] = 48, /* ...to 48 + NUM_GICV2M_SPIS - 1 */
[VIRT_PLATFORM_BUS] = 112, /* ...to 112 + PLATFORM_BUS_NUM_IRQS -1 */
@@ -676,7 +678,7 @@ static void create_uart(const VirtMachineState *vms,
qemu_irq *pic, int uart,
if (uart == VIRT_UART) {
qemu_fdt_setprop_string(vms->fdt, "/chosen", "stdout-path", nodename);
- } else {
+ } else if (uart == VIRT_SECURE_UART) {
/* Mark as not usable by the normal world */
qemu_fdt_setprop_string(vms->fdt, nodename, "status", "disabled");
qemu_fdt_setprop_string(vms->fdt, nodename, "secure-status", "okay");
@@ -1260,6 +1262,7 @@ static void machvirt_init(MachineState *machine)
int n, virt_max_cpus;
MemoryRegion *ram = g_new(MemoryRegion, 1);
bool firmware_loaded = bios_name || drive_get(IF_PFLASH, 0, 0);
+ int uart_count = 0;
/* We can probe only here because during property set
* KVM is not available yet
@@ -1419,11 +1422,16 @@ static void machvirt_init(MachineState *machine)
fdt_add_pmu_nodes(vms);
- create_uart(vms, pic, VIRT_UART, sysmem, serial_hds[0]);
+ create_uart(vms, pic, VIRT_UART, sysmem, serial_hds[uart_count++]);
if (vms->secure) {
create_secure_ram(vms, secure_sysmem);
- create_uart(vms, pic, VIRT_SECURE_UART, secure_sysmem, serial_hds[1]);
+ create_uart(vms, pic, VIRT_SECURE_UART, secure_sysmem,
+ serial_hds[uart_count++]);
+ }
+
+ if (!vmc->no_second_uart) {
+ create_uart(vms, pic, VIRT_UART_2, sysmem, serial_hds[uart_count++]);
}
create_rtc(vms, pic);
@@ -1693,8 +1701,13 @@ static void virt_2_11_instance_init(Object *obj)
static void virt_machine_2_11_options(MachineClass *mc)
{
+ VirtMachineClass *vmc = VIRT_MACHINE_CLASS(OBJECT_CLASS(mc));
+
virt_machine_2_12_options(mc);
SET_MACHINE_COMPAT(mc, VIRT_COMPAT_2_11);
+
+ /* The second NS UART was added in 2.12 */
+ vmc->no_second_uart = true;
}
DEFINE_VIRT_MACHINE(2, 11)
--
2.7.4
Re: [Qemu-arm] [Qemu-devel] [PATCH 2/3] hw/arm/virt: Add another UART to the virt board, Andrew Jones, 2017/12/12
[Qemu-arm] [PATCH 3/3] hw/arm/virt-acpi-build: Add second UART to ACPI tables, Peter Maydell, 2017/12/08