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dm: uart_pt: pass through UART as ACPI device.

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Add UART to ACPI device list to support UART pass through as ACPI device
by --acpidev_pt parameter.

Tracked-On: #8638
Signed-off-by: Yichong Tang <yichong.tang@intel.com>
Co-developed-by: Na Cui <na.cui@intel.com>
Reviewed-by: Jian Jun Chen <jian.jun.chen@intel.com>
This commit is contained in:
yichongt 2024-06-28 15:26:04 +08:00 committed by wenlingz
parent ced35ea51d
commit 5f4f67eefd
2 changed files with 95 additions and 0 deletions
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1
devicemodel/Makefile
View File

@ -128,6 +128,7 @@ SRCS += hw/platform/rpmb/att_keybox.c
SRCS += hw/platform/tpm/tpm_emulator.c
SRCS += hw/platform/tpm/tpm_crb.c
SRCS += hw/platform/tpm/tpm.c
SRCS += hw/platform/uart.c
SRCS += hw/platform/debugexit.c
SRCS += hw/pci/wdt_i6300esb.c
SRCS += hw/pci/lpc.c

94
devicemodel/hw/platform/uart.c Normal file
View File

@ -0,0 +1,94 @@
/*
* Copyright (C) 2018-2024 Intel Corporation.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdbool.h>
#include <errno.h>
#include "acpi.h"
#include "vmmapi.h"
#include "log.h"
#include "acpi_dev.h"
#include "dm.h"
static uint32_t uart_idx = 0U;
static int pt_uart_init(struct vmctx *ctx, struct acrn_acpidev *uart_dev)
{
if(!ctx || !uart_dev)
return -EINVAL;
strncpy(uart_dev->name, "uart", sizeof(uart_dev->name));
return init_pt_acpidev(ctx, uart_dev);
}
static int is_hid_legacy_uart(char *opts)
{
int ret = true;
char *hid =NULL;
char *vtopts = NULL, *bak_vtopts = NULL;
if (!opts || !*opts)
return false;
vtopts = strdup(opts);
bak_vtopts = vtopts;
hid = strsep(&vtopts, ",");
if (!hid || strstr(hid, "PNP0501") == NULL)
ret = false;
free(bak_vtopts);
return ret;
}
static void uart_write_dsdt(struct vmctx *ctx, struct acpi_dev *acpidev)
{
if (!ctx || !acpidev)
return;
struct acrn_acpidev *dev = &acpidev->dev;
struct acrn_acpires *res =NULL;
dsdt_line("");
dsdt_line("Device (COM%d)", uart_idx);
dsdt_line("{");
dsdt_line(" Name (_HID, EisaId (\"PNP0501\"))");
dsdt_line(" Name (_UID, %s)", acpidev->uid);
dsdt_line(" Name (_CRS, ResourceTemplate ()");
dsdt_line(" {");
dsdt_indent(2);
for(int i = 0; i < ACPIDEV_RES_NUM; i++) {
res = &dev->res[i];
if(res->type == MEMORY_RES)
dsdt_fixed_mem32(res->mmio_res.host_pa, res->mmio_res.size);
else if(res->type == IO_PORT_RES)
dsdt_fixed_ioport(res->pio_res.port_address, res->pio_res.size);
else if(res->type == IRQ_RES)
dsdt_fixed_irq(res->irq_res.irq);
}
dsdt_unindent(2);
dsdt_line(" })");
dsdt_line("}");
uart_idx++;
}
static void pt_uart_deinit(struct vmctx *ctx, struct acrn_acpidev *uartdev)
{
if (!ctx || !uartdev)
return;
vm_deassign_acpidev(ctx, uartdev);
}
struct acpi_dev_ops pt_uart_dev_ops = {
.hid = "PNP0501",
.match = is_hid_legacy_uart,
.init = pt_uart_init,
.deinit = pt_uart_deinit,
.write_dsdt = uart_write_dsdt,
};
DEFINE_ACPI_DEV(pt_uart_dev_ops);