From 26202873bb51fafdaa51be3e8de7aab9beb49f70 Mon Sep 17 00:00:00 2001 From: Hans-Christian Noren Egtvedt Date: Sun, 26 Feb 2017 12:56:39 +0100 Subject: avr32: remove support for AVR32 architecture MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This patch drops support for AVR32 architecture from the Linux kernel. The AVR32 architecture is not keeping up with the development of the kernel, and since it shares so much of the drivers with Atmel ARM SoC, it is starting to hinder these drivers to develop swiftly. Also, all AVR32 AP7 SoC processors are end of lifed from Atmel (now Microchip). Finally, the GCC toolchain is stuck at version 4.2.x, and has not received any patches since the last release from Atmel; 4.2.4-atmel.1.1.3.avr32linux.1. When building kernel v4.10, this toolchain is no longer able to properly link the network stack. Haavard and I have came to the conclusion that we feel keeping AVR32 on life support offers more obstacles for Atmel ARMs, than it gives joy to AVR32 users. I also suspect there are very few AVR32 users left today, if anybody at all. Signed-off-by: Hans-Christian Noren Egtvedt Signed-off-by: Håvard Skinnemoen Signed-off-by: Nicolas Ferre Acked-by: Andy Shevchenko Acked-by: Boris Brezillon --- arch/avr32/kernel/traps.c | 262 ---------------------------------------------- 1 file changed, 262 deletions(-) delete mode 100644 arch/avr32/kernel/traps.c (limited to 'arch/avr32/kernel/traps.c') diff --git a/arch/avr32/kernel/traps.c b/arch/avr32/kernel/traps.c deleted file mode 100644 index 50b541325025..000000000000 --- a/arch/avr32/kernel/traps.c +++ /dev/null @@ -1,262 +0,0 @@ -/* - * Copyright (C) 2004-2006 Atmel Corporation - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include -#include -#include -#include -#include -#include -#include /* print_modules */ -#include -#include -#include - -#include -#include -#include -#include -#include - -static DEFINE_SPINLOCK(die_lock); - -void die(const char *str, struct pt_regs *regs, long err) -{ - static int die_counter; - - console_verbose(); - spin_lock_irq(&die_lock); - bust_spinlocks(1); - - printk(KERN_ALERT "Oops: %s, sig: %ld [#%d]\n", - str, err, ++die_counter); - - printk(KERN_EMERG); - -#ifdef CONFIG_PREEMPT - printk(KERN_CONT "PREEMPT "); -#endif -#ifdef CONFIG_FRAME_POINTER - printk(KERN_CONT "FRAME_POINTER "); -#endif - if (current_cpu_data.features & AVR32_FEATURE_OCD) { - unsigned long did = ocd_read(DID); - printk(KERN_CONT "chip: 0x%03lx:0x%04lx rev %lu\n", - (did >> 1) & 0x7ff, - (did >> 12) & 0x7fff, - (did >> 28) & 0xf); - } else { - printk(KERN_CONT "cpu: arch %u r%u / core %u r%u\n", - current_cpu_data.arch_type, - current_cpu_data.arch_revision, - current_cpu_data.cpu_type, - current_cpu_data.cpu_revision); - } - - print_modules(); - show_regs_log_lvl(regs, KERN_EMERG); - show_stack_log_lvl(current, regs->sp, regs, KERN_EMERG); - bust_spinlocks(0); - add_taint(TAINT_DIE, LOCKDEP_NOW_UNRELIABLE); - spin_unlock_irq(&die_lock); - - if (in_interrupt()) - panic("Fatal exception in interrupt"); - - if (panic_on_oops) - panic("Fatal exception"); - - do_exit(err); -} - -void _exception(long signr, struct pt_regs *regs, int code, - unsigned long addr) -{ - siginfo_t info; - - if (!user_mode(regs)) { - const struct exception_table_entry *fixup; - - /* Are we prepared to handle this kernel fault? */ - fixup = search_exception_tables(regs->pc); - if (fixup) { - regs->pc = fixup->fixup; - return; - } - die("Unhandled exception in kernel mode", regs, signr); - } - - memset(&info, 0, sizeof(info)); - info.si_signo = signr; - info.si_code = code; - info.si_addr = (void __user *)addr; - force_sig_info(signr, &info, current); -} - -asmlinkage void do_nmi(unsigned long ecr, struct pt_regs *regs) -{ - int ret; - - nmi_enter(); - - ret = notify_die(DIE_NMI, "NMI", regs, 0, ecr, SIGINT); - switch (ret) { - case NOTIFY_OK: - case NOTIFY_STOP: - break; - case NOTIFY_BAD: - die("Fatal Non-Maskable Interrupt", regs, SIGINT); - default: - printk(KERN_ALERT "Got NMI, but nobody cared. Disabling...\n"); - nmi_disable(); - break; - } - nmi_exit(); -} - -asmlinkage void do_critical_exception(unsigned long ecr, struct pt_regs *regs) -{ - die("Critical exception", regs, SIGKILL); -} - -asmlinkage void do_address_exception(unsigned long ecr, struct pt_regs *regs) -{ - _exception(SIGBUS, regs, BUS_ADRALN, regs->pc); -} - -/* This way of handling undefined instructions is stolen from ARM */ -static LIST_HEAD(undef_hook); -static DEFINE_SPINLOCK(undef_lock); - -void register_undef_hook(struct undef_hook *hook) -{ - spin_lock_irq(&undef_lock); - list_add(&hook->node, &undef_hook); - spin_unlock_irq(&undef_lock); -} - -void unregister_undef_hook(struct undef_hook *hook) -{ - spin_lock_irq(&undef_lock); - list_del(&hook->node); - spin_unlock_irq(&undef_lock); -} - -static int do_cop_absent(u32 insn) -{ - int cop_nr; - u32 cpucr; - - if ((insn & 0xfdf00000) == 0xf1900000) - /* LDC0 */ - cop_nr = 0; - else - cop_nr = (insn >> 13) & 0x7; - - /* Try enabling the coprocessor */ - cpucr = sysreg_read(CPUCR); - cpucr |= (1 << (24 + cop_nr)); - sysreg_write(CPUCR, cpucr); - - cpucr = sysreg_read(CPUCR); - if (!(cpucr & (1 << (24 + cop_nr)))) - return -ENODEV; - - return 0; -} - -#ifdef CONFIG_BUG -int is_valid_bugaddr(unsigned long pc) -{ - unsigned short opcode; - - if (pc < PAGE_OFFSET) - return 0; - if (probe_kernel_address((u16 *)pc, opcode)) - return 0; - - return opcode == AVR32_BUG_OPCODE; -} -#endif - -asmlinkage void do_illegal_opcode(unsigned long ecr, struct pt_regs *regs) -{ - u32 insn; - struct undef_hook *hook; - void __user *pc; - long code; - -#ifdef CONFIG_BUG - if (!user_mode(regs) && (ecr == ECR_ILLEGAL_OPCODE)) { - enum bug_trap_type type; - - type = report_bug(regs->pc, regs); - switch (type) { - case BUG_TRAP_TYPE_NONE: - break; - case BUG_TRAP_TYPE_WARN: - regs->pc += 2; - return; - case BUG_TRAP_TYPE_BUG: - die("Kernel BUG", regs, SIGKILL); - } - } -#endif - - local_irq_enable(); - - if (user_mode(regs)) { - pc = (void __user *)instruction_pointer(regs); - if (get_user(insn, (u32 __user *)pc)) - goto invalid_area; - - if (ecr == ECR_COPROC_ABSENT && !do_cop_absent(insn)) - return; - - spin_lock_irq(&undef_lock); - list_for_each_entry(hook, &undef_hook, node) { - if ((insn & hook->insn_mask) == hook->insn_val) { - if (hook->fn(regs, insn) == 0) { - spin_unlock_irq(&undef_lock); - return; - } - } - } - spin_unlock_irq(&undef_lock); - } - - switch (ecr) { - case ECR_PRIVILEGE_VIOLATION: - code = ILL_PRVOPC; - break; - case ECR_COPROC_ABSENT: - code = ILL_COPROC; - break; - default: - code = ILL_ILLOPC; - break; - } - - _exception(SIGILL, regs, code, regs->pc); - return; - -invalid_area: - _exception(SIGSEGV, regs, SEGV_MAPERR, regs->pc); -} - -asmlinkage void do_fpe(unsigned long ecr, struct pt_regs *regs) -{ - /* We have no FPU yet */ - _exception(SIGILL, regs, ILL_COPROC, regs->pc); -} - - -void __init trap_init(void) -{ - -} -- cgit v1.2.3