From 76d2a0493a17d4c8ecc781366850c3c4f8e1a446 Mon Sep 17 00:00:00 2001 From: Palmer Dabbelt Date: Mon, 10 Jul 2017 18:00:26 -0700 Subject: RISC-V: Init and Halt Code This contains the various __init C functions, the initial assembly kernel entry point, and the code to reset the system. When a file was init-related this patch contains the entire file. Signed-off-by: Palmer Dabbelt --- arch/riscv/include/asm/bug.h | 88 ++++++++++++++++++++++++++++++++++++++++++ arch/riscv/include/asm/cache.h | 22 +++++++++++ arch/riscv/include/asm/smp.h | 52 +++++++++++++++++++++++++ 3 files changed, 162 insertions(+) create mode 100644 arch/riscv/include/asm/bug.h create mode 100644 arch/riscv/include/asm/cache.h create mode 100644 arch/riscv/include/asm/smp.h (limited to 'arch/riscv/include') diff --git a/arch/riscv/include/asm/bug.h b/arch/riscv/include/asm/bug.h new file mode 100644 index 0000000..c3e1376 --- /dev/null +++ b/arch/riscv/include/asm/bug.h @@ -0,0 +1,88 @@ +/* + * Copyright (C) 2012 Regents of the University of California + * + * 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. + * + * 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. + */ + +#ifndef _ASM_RISCV_BUG_H +#define _ASM_RISCV_BUG_H + +#include +#include +#include + +#include + +#ifdef CONFIG_GENERIC_BUG +#define __BUG_INSN _AC(0x00100073, UL) /* ebreak */ + +#ifndef __ASSEMBLY__ +typedef u32 bug_insn_t; + +#ifdef CONFIG_GENERIC_BUG_RELATIVE_POINTERS +#define __BUG_ENTRY_ADDR INT " 1b - 2b" +#define __BUG_ENTRY_FILE INT " %0 - 2b" +#else +#define __BUG_ENTRY_ADDR RISCV_PTR " 1b" +#define __BUG_ENTRY_FILE RISCV_PTR " %0" +#endif + +#ifdef CONFIG_DEBUG_BUGVERBOSE +#define __BUG_ENTRY \ + __BUG_ENTRY_ADDR "\n\t" \ + __BUG_ENTRY_FILE "\n\t" \ + SHORT " %1" +#else +#define __BUG_ENTRY \ + __BUG_ENTRY_ADDR +#endif + +#define BUG() \ +do { \ + __asm__ __volatile__ ( \ + "1:\n\t" \ + "ebreak\n" \ + ".pushsection __bug_table,\"a\"\n\t" \ + "2:\n\t" \ + __BUG_ENTRY "\n\t" \ + ".org 2b + %2\n\t" \ + ".popsection" \ + : \ + : "i" (__FILE__), "i" (__LINE__), \ + "i" (sizeof(struct bug_entry))); \ + unreachable(); \ +} while (0) +#endif /* !__ASSEMBLY__ */ +#else /* CONFIG_GENERIC_BUG */ +#ifndef __ASSEMBLY__ +#define BUG() \ +do { \ + __asm__ __volatile__ ("ebreak\n"); \ + unreachable(); \ +} while (0) +#endif /* !__ASSEMBLY__ */ +#endif /* CONFIG_GENERIC_BUG */ + +#define HAVE_ARCH_BUG + +#include + +#ifndef __ASSEMBLY__ + +struct pt_regs; +struct task_struct; + +extern void die(struct pt_regs *regs, const char *str); +extern void do_trap(struct pt_regs *regs, int signo, int code, + unsigned long addr, struct task_struct *tsk); + +#endif /* !__ASSEMBLY__ */ + +#endif /* _ASM_RISCV_BUG_H */ diff --git a/arch/riscv/include/asm/cache.h b/arch/riscv/include/asm/cache.h new file mode 100644 index 0000000..e8f0d11 --- /dev/null +++ b/arch/riscv/include/asm/cache.h @@ -0,0 +1,22 @@ +/* + * Copyright (C) 2017 Chen Liqin + * Copyright (C) 2012 Regents of the University of California + * + * 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. + * + * 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. + */ + +#ifndef _ASM_RISCV_CACHE_H +#define _ASM_RISCV_CACHE_H + +#define L1_CACHE_SHIFT 6 + +#define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT) + +#endif /* _ASM_RISCV_CACHE_H */ diff --git a/arch/riscv/include/asm/smp.h b/arch/riscv/include/asm/smp.h new file mode 100644 index 0000000..85e4220 --- /dev/null +++ b/arch/riscv/include/asm/smp.h @@ -0,0 +1,52 @@ +/* + * Copyright (C) 2012 Regents of the University of California + * + * 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. + * + * 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. + */ + +#ifndef _ASM_RISCV_SMP_H +#define _ASM_RISCV_SMP_H + +/* This both needs asm-offsets.h and is used when generating it. */ +#ifndef GENERATING_ASM_OFFSETS +#include +#endif + +#include +#include + +#ifdef CONFIG_SMP + +/* SMP initialization hook for setup_arch */ +void __init init_clockevent(void); + +/* SMP initialization hook for setup_arch */ +void __init setup_smp(void); + +/* Hook for the generic smp_call_function_many() routine. */ +void arch_send_call_function_ipi_mask(struct cpumask *mask); + +/* Hook for the generic smp_call_function_single() routine. */ +void arch_send_call_function_single_ipi(int cpu); + +/* + * This is particularly ugly: it appears we can't actually get the definition + * of task_struct here, but we need access to the CPU this task is running on. + * Instead of using C we're using asm-offsets.h to get the current processor + * ID. + */ +#define raw_smp_processor_id() (*((int*)((char*)get_current() + TASK_TI_CPU))) + +/* Interprocessor interrupt handler */ +irqreturn_t handle_ipi(void); + +#endif /* CONFIG_SMP */ + +#endif /* _ASM_RISCV_SMP_H */ -- cgit v1.1