/* SPDX-License-Identifier: GPL-2.0+ */ /* * Copyright (c) 2015 Gooogle, Inc * Written by Simon Glass <sjg@chromium.org> */ #ifndef _ASM_SIPI_H #define _ASM_SIPI_H #define AP_DEFAULT_BASE 0x30000 #define AP_DEFAULT_SIZE 0x10000 #ifndef __ASSEMBLY__ /** * struct sipi_params_16bit - 16-bit SIPI entry-point parameters * * These are set up in the same space as the SIPI 16-bit code so that each AP * can access the parameters when it boots. * * Each of these must be set up for the AP to boot, except @segment which is * set in the assembly code. * * @ap_start: 32-bit SIPI entry point for U-Boot * @segment: Code segment for U-Boot * @pad: Padding (not used) * @gdt_limit: U-Boot GDT limit (X86_GDT_SIZE - 1) * @gdt: U-Boot GDT (gd->arch.gdt) * @unused: Not used */ struct __packed sipi_params_16bit { u32 ap_start; u16 segment; u16 pad; u16 gdt_limit; u32 gdt; u16 unused; }; /** * struct sipi_params - 32-bit SIP entry-point parameters * * These are used by the AP init code and must be set up before the APs start. * The members must match with the sipi_params layout in sipi_vector.S. * * The stack area extends down from @stack_top, with @stack_size allocated * for each AP. * * @idt_ptr: Interrupt descriptor table pointer * @stack_top: Top of the AP stack area * @stack_size: Size of each AP's stack * @microcode_lock: Used to ensure only one AP loads microcode at once * 0xffffffff enables parallel loading. * @microcode_ptr: Pointer to microcode, or 0 if none * @msr_table_ptr: Pointer to saved MSRs, a list of struct saved_msr * @msr_count: Number of saved MSRs * @c_handler: C function to call once early init is complete * @ap_count: Shared atomic value to allocate CPU indexes */ struct sipi_params { u32 idt_ptr; u32 stack_top; u32 stack_size; u32 microcode_lock; u32 microcode_ptr; u32 msr_table_ptr; u32 msr_count; u32 c_handler; atomic_t ap_count; }; /* 16-bit AP entry point */ void ap_start16(void); /* end of 16-bit code/data, marks the region to be copied to SIP vector */ void ap_start16_code_end(void); /* 32-bit AP entry point */ void ap_start(void); extern char sipi_params_16bit[]; extern char sipi_params[]; #endif /* __ASSEMBLY__ */ #endif