mirror of
https://github.com/AetherDroid/android_kernel_samsung_on5xelte.git
synced 2025-11-01 16:48:51 +01:00
Fixed MTP to work with TWRP
This commit is contained in:
awab228
commit
f6dfaef42e
50820 changed files with 20846062 additions and 0 deletions
281
arch/frv/kernel/process.c
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281
arch/frv/kernel/process.c
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/* process.c: FRV specific parts of process handling
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*
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* Copyright (C) 2003-5 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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* - Derived from arch/m68k/kernel/process.c
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/sched.h>
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#include <linux/kernel.h>
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#include <linux/mm.h>
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#include <linux/smp.h>
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#include <linux/stddef.h>
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#include <linux/unistd.h>
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#include <linux/ptrace.h>
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#include <linux/slab.h>
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#include <linux/user.h>
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#include <linux/elf.h>
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#include <linux/reboot.h>
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#include <linux/interrupt.h>
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#include <linux/pagemap.h>
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#include <linux/rcupdate.h>
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#include <asm/asm-offsets.h>
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#include <asm/uaccess.h>
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#include <asm/setup.h>
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#include <asm/pgtable.h>
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#include <asm/tlb.h>
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#include <asm/gdb-stub.h>
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#include <asm/mb-regs.h>
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#include "local.h"
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asmlinkage void ret_from_fork(void);
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asmlinkage void ret_from_kernel_thread(void);
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#include <asm/pgalloc.h>
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void (*pm_power_off)(void);
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EXPORT_SYMBOL(pm_power_off);
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static void core_sleep_idle(void)
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{
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#ifdef LED_DEBUG_SLEEP
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/* Show that we're sleeping... */
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__set_LEDS(0x55aa);
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#endif
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frv_cpu_core_sleep();
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#ifdef LED_DEBUG_SLEEP
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/* ... and that we woke up */
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__set_LEDS(0);
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#endif
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mb();
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}
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void arch_cpu_idle(void)
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{
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if (!frv_dma_inprogress)
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core_sleep_idle();
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else
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local_irq_enable();
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}
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void machine_restart(char * __unused)
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{
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unsigned long reset_addr;
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#ifdef CONFIG_GDBSTUB
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gdbstub_exit(0);
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#endif
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if (PSR_IMPLE(__get_PSR()) == PSR_IMPLE_FR551)
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reset_addr = 0xfefff500;
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else
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reset_addr = 0xfeff0500;
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/* Software reset. */
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asm volatile(" dcef @(gr0,gr0),1 ! membar !"
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" sti %1,@(%0,0) !"
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" nop ! nop ! nop ! nop ! nop ! "
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" nop ! nop ! nop ! nop ! nop ! "
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" nop ! nop ! nop ! nop ! nop ! "
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" nop ! nop ! nop ! nop ! nop ! "
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: : "r" (reset_addr), "r" (1) );
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for (;;)
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;
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}
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void machine_halt(void)
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{
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#ifdef CONFIG_GDBSTUB
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gdbstub_exit(0);
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#endif
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for (;;);
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}
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void machine_power_off(void)
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{
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#ifdef CONFIG_GDBSTUB
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gdbstub_exit(0);
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#endif
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for (;;);
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}
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void flush_thread(void)
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{
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/* nothing */
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}
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inline unsigned long user_stack(const struct pt_regs *regs)
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{
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while (regs->next_frame)
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regs = regs->next_frame;
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return user_mode(regs) ? regs->sp : 0;
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}
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/*
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* set up the kernel stack and exception frames for a new process
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*/
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int copy_thread(unsigned long clone_flags,
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unsigned long usp, unsigned long arg,
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struct task_struct *p)
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{
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struct pt_regs *childregs;
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childregs = (struct pt_regs *)
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(task_stack_page(p) + THREAD_SIZE - FRV_FRAME0_SIZE);
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/* set up the userspace frame (the only place that the USP is stored) */
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*childregs = *current_pt_regs();
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p->thread.frame = childregs;
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p->thread.curr = p;
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p->thread.sp = (unsigned long) childregs;
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p->thread.fp = 0;
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p->thread.lr = 0;
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p->thread.frame0 = childregs;
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if (unlikely(p->flags & PF_KTHREAD)) {
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childregs->gr9 = usp; /* function */
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childregs->gr8 = arg;
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p->thread.pc = (unsigned long) ret_from_kernel_thread;
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save_user_regs(p->thread.user);
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return 0;
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}
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if (usp)
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childregs->sp = usp;
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childregs->next_frame = NULL;
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p->thread.pc = (unsigned long) ret_from_fork;
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/* the new TLS pointer is passed in as arg #5 to sys_clone() */
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if (clone_flags & CLONE_SETTLS)
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childregs->gr29 = childregs->gr12;
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save_user_regs(p->thread.user);
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return 0;
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} /* end copy_thread() */
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unsigned long get_wchan(struct task_struct *p)
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{
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struct pt_regs *regs0;
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unsigned long fp, pc;
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unsigned long stack_limit;
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int count = 0;
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if (!p || p == current || p->state == TASK_RUNNING)
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return 0;
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stack_limit = (unsigned long) (p + 1);
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fp = p->thread.fp;
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regs0 = p->thread.frame0;
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do {
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if (fp < stack_limit || fp >= (unsigned long) regs0 || fp & 3)
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return 0;
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pc = ((unsigned long *) fp)[2];
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/* FIXME: This depends on the order of these functions. */
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if (!in_sched_functions(pc))
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return pc;
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fp = *(unsigned long *) fp;
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} while (count++ < 16);
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return 0;
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}
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unsigned long thread_saved_pc(struct task_struct *tsk)
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{
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/* Check whether the thread is blocked in resume() */
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if (in_sched_functions(tsk->thread.pc))
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return ((unsigned long *)tsk->thread.fp)[2];
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else
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return tsk->thread.pc;
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}
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int elf_check_arch(const struct elf32_hdr *hdr)
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{
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unsigned long hsr0 = __get_HSR(0);
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unsigned long psr = __get_PSR();
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if (hdr->e_machine != EM_FRV)
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return 0;
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switch (hdr->e_flags & EF_FRV_GPR_MASK) {
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case EF_FRV_GPR64:
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if ((hsr0 & HSR0_GRN) == HSR0_GRN_32)
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return 0;
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case EF_FRV_GPR32:
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case 0:
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break;
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default:
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return 0;
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}
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switch (hdr->e_flags & EF_FRV_FPR_MASK) {
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case EF_FRV_FPR64:
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if ((hsr0 & HSR0_FRN) == HSR0_FRN_32)
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return 0;
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case EF_FRV_FPR32:
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case EF_FRV_FPR_NONE:
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case 0:
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break;
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default:
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return 0;
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}
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if ((hdr->e_flags & EF_FRV_MULADD) == EF_FRV_MULADD)
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if (PSR_IMPLE(psr) != PSR_IMPLE_FR405 &&
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PSR_IMPLE(psr) != PSR_IMPLE_FR451)
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return 0;
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switch (hdr->e_flags & EF_FRV_CPU_MASK) {
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case EF_FRV_CPU_GENERIC:
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break;
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case EF_FRV_CPU_FR300:
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case EF_FRV_CPU_SIMPLE:
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case EF_FRV_CPU_TOMCAT:
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default:
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return 0;
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case EF_FRV_CPU_FR400:
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if (PSR_IMPLE(psr) != PSR_IMPLE_FR401 &&
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PSR_IMPLE(psr) != PSR_IMPLE_FR405 &&
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PSR_IMPLE(psr) != PSR_IMPLE_FR451 &&
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PSR_IMPLE(psr) != PSR_IMPLE_FR551)
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return 0;
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break;
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case EF_FRV_CPU_FR450:
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if (PSR_IMPLE(psr) != PSR_IMPLE_FR451)
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return 0;
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break;
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case EF_FRV_CPU_FR500:
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if (PSR_IMPLE(psr) != PSR_IMPLE_FR501)
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return 0;
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break;
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case EF_FRV_CPU_FR550:
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if (PSR_IMPLE(psr) != PSR_IMPLE_FR551)
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return 0;
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break;
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}
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return 1;
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}
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int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpregs)
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{
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memcpy(fpregs,
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¤t->thread.user->f,
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sizeof(current->thread.user->f));
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return 1;
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}
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