diff options
Diffstat (limited to 'arch/x86/include/asm/arch-slimbootloader/slimbootloader.h')
| -rw-r--r-- | arch/x86/include/asm/arch-slimbootloader/slimbootloader.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/arch/x86/include/asm/arch-slimbootloader/slimbootloader.h b/arch/x86/include/asm/arch-slimbootloader/slimbootloader.h index 4ee8a0627e..174a341d32 100644 --- a/arch/x86/include/asm/arch-slimbootloader/slimbootloader.h +++ b/arch/x86/include/asm/arch-slimbootloader/slimbootloader.h @@ -17,6 +17,13 @@ 0xa9, 0xe4, 0x92, 0xf3, 0x57, 0xd1, 0x28, 0x32) /** + * A GUID to get SerialPort info hob which is provided by Slim Bootloader + */ +#define SBL_SERIAL_PORT_INFO_GUID \ + EFI_GUID(0x6c6872fe, 0x56a9, 0x4403, \ + 0xbb, 0x98, 0x95, 0x8d, 0x62, 0xde, 0x87, 0xf1) + +/** * A single entry of memory map information * * @addr: start address of a memory map entry @@ -50,4 +57,31 @@ struct sbl_memory_map_info { struct sbl_memory_map_entry entry[0]; }; +/** + * This includes serial port info which has already been initialized in previous + * Slim Bootloader stage. + * The Slim Bootloader initializes serial port regardless of debug/release build + * modes, and it passes the information to a payload thru hob. So, a payload can + * re-use the serial information without re-initializing serial port. + * + * @rev : revision of serial_port_info structure. currently 1. + * @rsvd : padding for alignment + * @type : port io: 1, mmio: 2 + * @base : io base address. ex) 0x3f8, 0x80001000 + * @baud : uart baud rate + * @stride: register stride in Bytes + * @clk : uart frequency in Hz + * @rsvd1 : reserved + */ +struct sbl_serial_port_info { + u8 rev; + u8 rsvd[3]; + u32 type; + u32 base; + u32 baud; + u32 stride; + u32 clk; + u32 rsvd1; +}; + #endif /* __SLIMBOOTLOADER_ARCH_H__ */ |