diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/include/asm/acpi_table.h | 11 | ||||
| -rw-r--r-- | arch/x86/lib/acpi_table.c | 41 |
2 files changed, 52 insertions, 0 deletions
diff --git a/arch/x86/include/asm/acpi_table.h b/arch/x86/include/asm/acpi_table.h index 7047ee6c772..1b7ff509516 100644 --- a/arch/x86/include/asm/acpi_table.h +++ b/arch/x86/include/asm/acpi_table.h @@ -47,6 +47,17 @@ u32 acpi_fill_csrt(u32 current); int acpi_write_hpet(struct acpi_ctx *ctx); /** + * acpi_write_dbg2_pci_uart() - Write out a DBG2 table + * + * @ctx: Current ACPI context + * @dev: Debug UART device to describe + * @access_size: Access size for UART (e.g. ACPI_ACCESS_SIZE_DWORD_ACCESS) + * @return 0 if OK, -ve on error + */ +int acpi_write_dbg2_pci_uart(struct acpi_ctx *ctx, struct udevice *dev, + uint access_size); + +/** * acpi_create_gnvs() - Create a GNVS (Global Non Volatile Storage) table * * @gnvs: Table to fill in diff --git a/arch/x86/lib/acpi_table.c b/arch/x86/lib/acpi_table.c index 0080c96cfe7..e257c789838 100644 --- a/arch/x86/lib/acpi_table.c +++ b/arch/x86/lib/acpi_table.c @@ -15,6 +15,7 @@ #include <serial.h> #include <version.h> #include <acpi/acpigen.h> +#include <acpi/acpi_device.h> #include <acpi/acpi_table.h> #include <asm/acpi/global_nvs.h> #include <asm/ioapic.h> @@ -588,3 +589,43 @@ int acpi_write_hpet(struct acpi_ctx *ctx) return 0; } + +int acpi_write_dbg2_pci_uart(struct acpi_ctx *ctx, struct udevice *dev, + uint access_size) +{ + struct acpi_dbg2_header *dbg2 = ctx->current; + char path[ACPI_PATH_MAX]; + struct acpi_gen_regaddr address; + phys_addr_t addr; + int ret; + + if (!device_active(dev)) { + log_info("Device not enabled\n"); + return -EACCES; + } + /* + * PCI devices don't remember their resource allocation information in + * U-Boot at present. We assume that MMIO is used for the UART and that + * the address space is 32 bytes: ns16550 uses 8 registers of up to + * 32-bits each. This is only for debugging so it is not a big deal. + */ + addr = dm_pci_read_bar32(dev, 0); + printf("UART addr %lx\n", (ulong)addr); + + memset(&address, '\0', sizeof(address)); + address.space_id = ACPI_ADDRESS_SPACE_MEMORY; + address.addrl = (uint32_t)addr; + address.addrh = (uint32_t)((addr >> 32) & 0xffffffff); + address.access_size = access_size; + + ret = acpi_device_path(dev, path, sizeof(path)); + if (ret) + return log_msg_ret("path", ret); + acpi_create_dbg2(dbg2, ACPI_DBG2_SERIAL_PORT, + ACPI_DBG2_16550_COMPATIBLE, &address, 0x1000, path); + + acpi_inc_align(ctx, dbg2->header.length); + acpi_add_table(ctx, dbg2); + + return 0; +} |