diff options
Diffstat (limited to 'arch/x86/cpu/queensbay/tnc_car.S')
| -rw-r--r-- | arch/x86/cpu/queensbay/tnc_car.S | 124 |
1 files changed, 0 insertions, 124 deletions
diff --git a/arch/x86/cpu/queensbay/tnc_car.S b/arch/x86/cpu/queensbay/tnc_car.S deleted file mode 100644 index 5e09568..0000000 --- a/arch/x86/cpu/queensbay/tnc_car.S +++ /dev/null @@ -1,124 +0,0 @@ -/* - * Copyright (C) 2014, Bin Meng <bmeng.cn@gmail.com> - * - * SPDX-License-Identifier: GPL-2.0+ - */ - -#include <config.h> -#include <asm/post.h> - -.globl car_init -car_init: - /* - * Note: ebp holds the BIST value (built-in self test) so far, but ebp - * will be destroyed through the FSP call, thus we have to test the - * BIST value here before we call into FSP. - */ - test %ebp, %ebp - jz car_init_start - post_code(POST_BIST_FAILURE) - jmp die - -car_init_start: - post_code(POST_CAR_START) - lea find_fsp_header_romstack, %esp - jmp find_fsp_header - -find_fsp_header_ret: - /* EAX points to FSP_INFO_HEADER */ - mov %eax, %ebp - - /* sanity test */ - cmp $CONFIG_FSP_ADDR, %eax - jb die - - /* calculate TempRamInitEntry address */ - mov 0x30(%ebp), %eax - add 0x1c(%ebp), %eax - - /* call FSP TempRamInitEntry to setup temporary stack */ - lea temp_ram_init_romstack, %esp - jmp *%eax - -temp_ram_init_ret: - addl $4, %esp - cmp $0, %eax - jnz car_init_fail - - post_code(POST_CAR_CPU_CACHE) - - /* - * The FSP TempRamInit initializes the ecx and edx registers to - * point to a temporary but writable memory range (Cache-As-RAM). - * ecx: the start of this temporary memory range, - * edx: the end of this range. - */ - - /* stack grows down from top of CAR */ - movl %edx, %esp - - /* - * TODO: - * - * According to FSP architecture spec, the fsp_init() will not return - * to its caller, instead it requires the bootloader to provide a - * so-called continuation function to pass into the FSP as a parameter - * of fsp_init, and fsp_init() will call that continuation function - * directly. - * - * The call to fsp_init() may need to be moved out of the car_init() - * to cpu_init_f() with the help of some inline assembly codes. - * Note there is another issue that fsp_init() will setup another stack - * using the fsp_init parameter stack_top after DRAM is initialized, - * which means any data on the previous stack (on the CAR) gets lost - * (ie: U-Boot global_data). FSP is supposed to support such scenario, - * however it does not work. This should be revisited in the future. - */ - movl $CONFIG_FSP_TEMP_RAM_ADDR, %eax - xorl %edx, %edx - xorl %ecx, %ecx - call fsp_init - -.global fsp_init_done -fsp_init_done: - /* - * We come here from FspInit with eax pointing to the HOB list. - * Save eax to esi temporarily. - */ - movl %eax, %esi - /* - * Re-initialize the ebp (BIST) to zero, as we already reach here - * which means we passed BIST testing before. - */ - xorl %ebp, %ebp - jmp car_init_ret - -car_init_fail: - post_code(POST_CAR_FAILURE) - -die: - hlt - jmp die - hlt - - /* - * The function call before CAR initialization is tricky. It cannot - * be called using the 'call' instruction but only the 'jmp' with - * the help of a handcrafted stack in the ROM. The stack needs to - * contain the function return address as well as the parameters. - */ - .balign 4 -find_fsp_header_romstack: - .long find_fsp_header_ret - - .balign 4 -temp_ram_init_romstack: - .long temp_ram_init_ret - .long temp_ram_init_params -temp_ram_init_params: -_dt_ucode_base_size: - /* These next two fields are filled in by ifdtool */ - .long 0 /* microcode base */ - .long 0 /* microcode size */ - .long CONFIG_SYS_MONITOR_BASE /* code region base */ - .long CONFIG_SYS_MONITOR_LEN /* code region size */ |