From 4e0ec592553fd94e14a239eeb05ba9ccb668b814 Mon Sep 17 00:00:00 2001 From: Frans Hendriks Date: Thu, 6 Jun 2019 10:07:17 +0200 Subject: {drivers,soc/intel/braswell}: Implement C_ENVIRONMENT_BOOTBLOCK support No C_ENVIRONMENT_BOOTBLOCK support for Braswell is available. Enable support and add required files for the Braswell Bootblock in C. The next changes are made support C_ENVIRONMENT_BOOTBLOCK: - Add car_stage_entry() function bootblock-c_entry() functions. - Specify config DCACHE_BSP_STACK_SIZE and C_ENV_BOOTBLOCK_SIZE. - Add bootblock_c_entry(). - Move init from car_soc_XXX_console_init() to bootblock_soc_XXX_Init() Removed the unused cache_as_ram_main() and weak car_XXX_XXX_console_init() BUG=NA TEST=Booting Embedded Linux on Facebook FBG-1701 Building Google Banos Change-Id: Iab48ad72f1514c93f20d70db5ef4fd8fa2383e8c Signed-off-by: Frans Hendriks Reviewed-on: https://review.coreboot.org/c/coreboot/+/29662 Tested-by: build bot (Jenkins) Reviewed-by: Arthur Heymans --- src/drivers/intel/fsp1_1/cache_as_ram.S | 214 ++++++++++++++++++++++++++++++++ 1 file changed, 214 insertions(+) create mode 100644 src/drivers/intel/fsp1_1/cache_as_ram.S (limited to 'src/drivers/intel/fsp1_1/cache_as_ram.S') diff --git a/src/drivers/intel/fsp1_1/cache_as_ram.S b/src/drivers/intel/fsp1_1/cache_as_ram.S new file mode 100644 index 0000000000..3460b9da34 --- /dev/null +++ b/src/drivers/intel/fsp1_1/cache_as_ram.S @@ -0,0 +1,214 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2000,2007 Ronald G. Minnich + * Copyright (C) 2007-2008 coresystems GmbH + * Copyright (C) 2013-2014 Sage Electronic Engineering, LLC. + * Copyright (C) 2015 Intel Corp. + * Copyright (C) 2018-2019 Eltan B.V. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include + +/* + * Replacement for cache_as_ram.inc when using the FSP binary. This code + * locates the FSP binary, initializes the cache as RAM and performs the + * first stage of initialization. Next this code switches the stack from + * the cache to RAM and then disables the cache as RAM. Finally this code + * performs the final stage of initialization. + */ + +#define LHLT_DELAY 0x50000 /* I/O delay between post codes on failure */ + +.global bootblock_pre_c_entry +bootblock_pre_c_entry: + /* + * Per FSP1.1 specs, following registers are preserved: + * EBX, EDI, ESI, EBP, MM0, MM1 + * + * Shift values to release MM2. + * mm0 -> ebx: BIST value + * mm1 -> mm0: low 32-bits of TSC value + * mm2 -> mm1: high 32-bits of TSC value + */ + movd %mm0, %ebx + movd %mm1, %eax + movd %eax, %mm0 + movd %mm2, %eax + movd %eax, %mm1 + +cache_as_ram: + post_code(0x20) + + /* + * Find the FSP binary in cbfs. + * Make a fake stack that has the return value back to this code. + */ + lea fake_fsp_stack, %esp + jmp find_fsp +find_fsp_ret: + /* Save the FSP location */ + mov %eax, %ebp + + /* + * Only when a valid FSP binary is found at CONFIG_FSP_LOC is + * the returned FSP_INFO_HEADER structure address above the base + * address of FSP binary specified by the CONFIG_FSP_LOC value. + * All of the error values are in the 0x8xxxxxxx range which are + * below the CONFIG_FSP_LOC value. + */ + cmp $CONFIG_FSP_LOC, %eax + jbe halt1 + + post_code(POST_FSP_TEMP_RAM_INIT) + + /* Calculate entry into FSP */ + mov 0x30(%ebp), %eax /* Load TempRamInitEntry */ + add 0x1c(%ebp), %eax /* add in the offset for FSP */ + + /* + * Pass early init variables on a fake stack (no memory yet) + * as well as the return location + */ + lea CAR_init_stack, %esp + + /* + * BIST value is zero + * eax: TempRamInitApi address + * ebx: BIST value + * ebp: FSP_INFO_HEADER address + * esi: Not used + * mm0: low 32-bits of TSC value + * mm1: high 32-bits of TSC value + */ + + /* call FSP binary to setup temporary stack */ + jmp *%eax + +CAR_init_done: + + /* + * ebp: FSP_INFO_HEADER address + * ebx: BIST value + * ecx: Temp RAM base + * edx: Temp RAM top + * mm0: low 32-bits of TSC value + * mm1: high 32-bits of TSC value + */ + + cmp $0, %eax + jne halt2 + + /* Setup bootloader stack */ + movl %edx, %esp + + /* + * ebp: FSP_INFO_HEADER address + * ebx: BIST value + * ecx: Temp RAM base + * edx: Temp RAM top + * esp: Top of stack in temp RAM + * mm0: low 32-bits of TSC value + * mm1: high 32-bits of TSC value + */ + + /* coreboot assumes stack/heap region will be zero */ + cld + movl %ecx, %edi + neg %ecx + /* Clear up to Temp Ram top. */ + add %edx, %ecx + shrl $2, %ecx + xorl %eax, %eax + rep stosl + + /* Need to align stack to 16 bytes at call instruction. Account for + the pushes below. */ + andl $0xfffffff0, %esp + subl $8, %esp + + /* Push initial timestamp on the stack */ + movd %mm1, %eax + pushl %eax /* tsc[63:32] */ + movd %mm0, %eax + pushl %eax /* tsc[31:0] */ + +before_romstage: + post_code(0x2A) + + /* Call bootblock_c_entry(uint64_t base_timestamp) */ + call bootblock_c_entry + + /* Never reached */ + +halt1: + /* + * Failures for postcode 0xBA - failed in fsp_fih_early_find() + * + * Values are: + * 0x01 - FV signature, "_FVH" not present + * 0x02 - FFS GUID not present + * 0x03 - FSP INFO Header not found + * 0x04 - ImageBase does not equal CONFIG_FSP_LOC - Is the FSP rebased + * to a different location, or does it need to be? + * 0x05 - FSP INFO Header signature "FSPH" not found + * 0x06 - FSP Image ID is not the expected ID. + */ + movb $0xBA, %ah + jmp .Lhlt + +halt2: + /* + * Failures for postcode 0xBB - failed in the FSP: + * + * 0x00 - FSP_SUCCESS: Temp RAM was initialized successfully. + * 0x02 - FSP_INVALID_PARAMETER: Input parameters are invalid. + * 0x03 - FSP_UNSUPPORTED: The FSP calling conditions were not met. + * 0x07 - FSP_DEVICE_ERROR: Temp RAM initialization failed + * 0x0E - FSP_NOT_FOUND: No valid microcode was found in the microcode + * region. + * 0x14 - FSP_ALREADY_STARTED: Temp RAM initialization has been invoked + */ + movb $0xBB, %ah + jmp .Lhlt + +.Lhlt: + xchg %al, %ah +#if CONFIG(POST_IO) + outb %al, $CONFIG_POST_IO_PORT +#else + post_code(POST_DEAD_CODE) +#endif + movl $LHLT_DELAY, %ecx +.Lhlt_Delay: + outb %al, $0xED + loop .Lhlt_Delay + jmp .Lhlt + +/* + * esp is set to this location so that the call into and return from the FSP + * in find_fsp will work. + */ + .align 4 +fake_fsp_stack: + .long find_fsp_ret + .long CONFIG_FSP_LOC /* FSP base address */ + +CAR_init_params: + .long CONFIG_CPU_MICROCODE_CBFS_LOC /* Microcode Location */ + .long CONFIG_CPU_MICROCODE_CBFS_LEN /* Microcode Length */ + .long 0xFFFFFFFF - CONFIG_ROM_SIZE + 1 /* Firmware Location */ + .long CONFIG_ROM_SIZE /* Firmware Length */ + +CAR_init_stack: + .long CAR_init_done + .long CAR_init_params -- cgit v1.2.3