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https://github.com/brain-hackers/u-boot-brain
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35b65dd8ef
Historically, the reset_cpu() function had an `addr` parameter which was
meant to pass in an address of the reset vector location, where the CPU
should reset to. This feature is no longer used anywhere in U-Boot as
all reset_cpu() implementations now ignore the passed value. Generic
code has been added which always calls reset_cpu() with `0` which means
this feature can no longer be used easily anyway.
Over time, many implementations seem to have "misunderstood" the
existence of this parameter as a way to customize/parameterize the reset
(e.g. COLD vs WARM resets). As this is not properly supported, the
code will almost always not do what it is intended to (because all
call-sites just call reset_cpu() with 0).
To avoid confusion and to clean up the codebase from unused left-overs
of the past, remove the `addr` parameter entirely. Code which intends
to support different kinds of resets should be rewritten as a sysreset
driver instead.
This transformation was done with the following coccinelle patch:
@@
expression argvalue;
@@
- reset_cpu(argvalue)
+ reset_cpu()
@@
identifier argname;
type argtype;
@@
- reset_cpu(argtype argname)
+ reset_cpu(void)
{ ... }
Signed-off-by: Harald Seiler <hws@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
119 lines
2.7 KiB
C
119 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2002
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* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Alex Zuepke <azu@sysgo.de>
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*
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* Copyright (C) 2011 Andes Technology Corporation
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* Shawn Lin, Andes Technology Corporation <nobuhiro@andestech.com>
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* Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com>
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*/
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#include <common.h>
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#include <cpu_func.h>
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#include <irq_func.h>
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#include <asm/ptrace.h>
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#include <asm/system.h>
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#undef INTERRUPT_MODE
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static int int_flag;
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int irq_flags; /* needed by asm-nds32/system.h */
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int GIE_STATUS(void)
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{
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int ret;
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__asm__ __volatile__ (
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"mfsr $p0, $psw\n\t"
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"andi %0, %0, 0x1\n\t"
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: "=r" (ret)
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:
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: "memory"
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);
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return ret;
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}
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#ifdef CONFIG_USE_INTERRUPT
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int interrupt_init(void)
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{
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return 0;
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}
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/* enable interrupts */
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void enable_interrupts(void)
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{
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local_irq_restore(int_flag);
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}
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/*
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* disable interrupts
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* Return true if GIE is enabled before we disable it.
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*/
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int disable_interrupts(void)
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{
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int gie_ori_status;
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gie_ori_status = GIE_STATUS();
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local_irq_save(int_flag);
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return gie_ori_status;
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}
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#endif
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void bad_mode(void)
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{
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panic("Resetting CPU ...\n");
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reset_cpu();
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}
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void show_regs(struct pt_regs *regs)
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{
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const char *processor_modes[] = {"USER", "SuperUser" , "HyperVisor"};
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printf("\n");
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printf("pc : [<%08lx>] sp: [<%08lx>]\n"
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"lp : %08lx gp : %08lx fp : %08lx\n",
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regs->ipc, regs->sp, regs->lp, regs->gp, regs->fp);
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printf("D1H: %08lx D1L: %08lx D0H: %08lx D0L: %08lx\n",
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regs->d1hi, regs->d1lo, regs->d0hi, regs->d0lo);
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printf("r27: %08lx r26: %08lx r25: %08lx r24: %08lx\n",
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regs->p1, regs->p0, regs->r[25], regs->r[24]);
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printf("r23: %08lx r22: %08lx r21: %08lx r20: %08lx\n",
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regs->r[23], regs->r[22], regs->r[21], regs->r[20]);
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printf("r19: %08lx r18: %08lx r17: %08lx r16: %08lx\n",
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regs->r[19], regs->r[18], regs->r[17], regs->r[16]);
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printf("r15: %08lx r14: %08lx r13: %08lx r12: %08lx\n",
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regs->r[15], regs->r[14], regs->r[13], regs->r[12]);
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printf("r11: %08lx r10: %08lx r9 : %08lx r8 : %08lx\n",
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regs->r[11], regs->r[10], regs->r[9], regs->r[8]);
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printf("r7 : %08lx r6 : %08lx r5 : %08lx r4 : %08lx\n",
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regs->r[7], regs->r[6], regs->r[5], regs->r[4]);
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printf("r3 : %08lx r2 : %08lx r1 : %08lx r0 : %08lx\n",
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regs->r[3], regs->r[2], regs->r[1], regs->r[0]);
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printf(" Interrupts %s Mode %s\n",
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interrupts_enabled(regs) ? "on" : "off",
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processor_modes[processor_mode(regs)]);
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}
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void do_interruption(struct pt_regs *pt_regs, int EVIC_num)
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{
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const char *interruption_type[] = {
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"Reset",
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"TLB Fill",
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"TLB Not Present",
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"TLB Misc",
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"VLPT Miss",
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"Cache Parity Error",
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"Debug",
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"General Exception",
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"External Interrupt"
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};
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printf("%s\n", interruption_type[EVIC_num]);
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show_regs(pt_regs);
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bad_mode();
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}
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