karo: fdt: fix panel-dpi support

[karo-tx-uboot.git] / arch / arm / lib / interrupts.c

diff --git a/arch/arm/lib/interrupts.c b/arch/arm/lib/interrupts.c
index 849a37a490d31182eb955c12661abe7c993ff5c9..5ee87b89c82e6b0b40abcd38a93cc280eec862cc 100644 (file)
--- a/arch/arm/lib/interrupts.c
+++ b/arch/arm/lib/interrupts.c
@@ -16,17 +16,20 @@
  * (C) Copyright 2004
  * Philippe Robin, ARM Ltd. <philippe.robin@arm.com>
  *
- * SPDX-License-Identifier:    GPL-2.0+ 
+ * SPDX-License-Identifier:    GPL-2.0+
  */
 
 #include <common.h>
 #include <asm/proc-armv/ptrace.h>
+#include <asm/u-boot-arm.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
 #ifdef CONFIG_USE_IRQ
 int interrupt_init (void)
 {
+       unsigned long cpsr;
+
        /*
         * setup up stacks if necessary
         */
@@ -34,6 +37,31 @@ int interrupt_init (void)
        IRQ_STACK_START_IN = gd->irq_sp + 8;
        FIQ_STACK_START = IRQ_STACK_START - CONFIG_STACKSIZE_IRQ;
 
+
+       __asm__ __volatile__("mrs %0, cpsr\n"
+                            : "=r" (cpsr)
+                            :
+                            : "memory");
+
+       __asm__ __volatile__("msr cpsr_c, %0\n"
+                            "mov sp, %1\n"
+                            :
+                            : "r" (IRQ_MODE | I_BIT | F_BIT | (cpsr & ~FIQ_MODE)),
+                              "r" (IRQ_STACK_START)
+                            : "memory");
+
+       __asm__ __volatile__("msr cpsr_c, %0\n"
+                            "mov sp, %1\n"
+                            :
+                            : "r" (FIQ_MODE | I_BIT | F_BIT | (cpsr & ~IRQ_MODE)),
+                              "r" (FIQ_STACK_START)
+                            : "memory");
+
+       __asm__ __volatile__("msr cpsr_c, %0"
+                            :
+                            : "r" (cpsr)
+                            : "memory");
+
        return arch_interrupt_init();
 }
 
@@ -95,24 +123,29 @@ void bad_mode (void)
 
 void show_regs (struct pt_regs *regs)
 {
-       unsigned long flags;
-       const char *processor_modes[] = {
+       unsigned long __maybe_unused flags;
+       const char __maybe_unused *processor_modes[] = {
        "USER_26",      "FIQ_26",       "IRQ_26",       "SVC_26",
        "UK4_26",       "UK5_26",       "UK6_26",       "UK7_26",
        "UK8_26",       "UK9_26",       "UK10_26",      "UK11_26",
        "UK12_26",      "UK13_26",      "UK14_26",      "UK15_26",
        "USER_32",      "FIQ_32",       "IRQ_32",       "SVC_32",
        "UK4_32",       "UK5_32",       "UK6_32",       "ABT_32",
-       "UK8_32",       "UK9_32",       "UK10_32",      "UND_32",
+       "UK8_32",       "UK9_32",       "HYP_32",       "UND_32",
        "UK12_32",      "UK13_32",      "UK14_32",      "SYS_32",
        };
 
        flags = condition_codes (regs);
 
-       printf ("pc : [<%08lx>]    lr : [<%08lx>]\n"
-               "sp : %08lx  ip : %08lx  fp : %08lx\n",
-               instruction_pointer (regs),
-               regs->ARM_lr, regs->ARM_sp, regs->ARM_ip, regs->ARM_fp);
+       printf("pc : [<%08lx>]     lr : [<%08lx>]\n",
+              instruction_pointer(regs), regs->ARM_lr);
+       if (gd->flags & GD_FLG_RELOC) {
+               printf("reloc pc : [<%08lx>]       lr : [<%08lx>]\n",
+                      instruction_pointer(regs) - gd->reloc_off,
+                      regs->ARM_lr - gd->reloc_off);
+       }
+       printf("sp : %08lx  ip : %08lx   fp : %08lx\n",
+              regs->ARM_sp, regs->ARM_ip, regs->ARM_fp);
        printf ("r10: %08lx  r9 : %08lx  r8 : %08lx\n",
                regs->ARM_r10, regs->ARM_r9, regs->ARM_r8);
        printf ("r7 : %08lx  r6 : %08lx  r5 : %08lx  r4 : %08lx\n",
@@ -130,9 +163,17 @@ void show_regs (struct pt_regs *regs)
                thumb_mode (regs) ? " (T)" : "");
 }
 
+/* fixup PC to point to instruction leading to exception */
+static inline void fixup_pc(struct pt_regs *regs, int offset)
+{
+       uint32_t pc = instruction_pointer(regs) + offset;
+       regs->ARM_pc = pc | (regs->ARM_pc & PCMASK);
+}
+
 void do_undefined_instruction (struct pt_regs *pt_regs)
 {
        printf ("undefined instruction\n");
+       fixup_pc(pt_regs, -4);
        show_regs (pt_regs);
        bad_mode ();
 }
@@ -140,6 +181,7 @@ void do_undefined_instruction (struct pt_regs *pt_regs)
 void do_software_interrupt (struct pt_regs *pt_regs)
 {
        printf ("software interrupt\n");
+       fixup_pc(pt_regs, -4);
        show_regs (pt_regs);
        bad_mode ();
 }
@@ -147,20 +189,15 @@ void do_software_interrupt (struct pt_regs *pt_regs)
 void do_prefetch_abort (struct pt_regs *pt_regs)
 {
        printf ("prefetch abort\n");
+       fixup_pc(pt_regs, -8);
        show_regs (pt_regs);
        bad_mode ();
 }
 
 void do_data_abort (struct pt_regs *pt_regs)
 {
-       unsigned long fsr;
-
-       /* Read Fault Status Register */
-       asm volatile ("mrc p15, 0, %0, c5, c0, 0" : "=r"(fsr));
-
-       printf ("data abort\n\n");
-       if (fsr & 1)
-               printf ("MAYBE you should read doc/README.arm-unaligned-accesses\n\n");
+       printf ("data abort\n");
+       fixup_pc(pt_regs, -8);
        show_regs (pt_regs);
        bad_mode ();
 }
@@ -168,6 +205,7 @@ void do_data_abort (struct pt_regs *pt_regs)
 void do_not_used (struct pt_regs *pt_regs)
 {
        printf ("not used\n");
+       fixup_pc(pt_regs, -8);
        show_regs (pt_regs);
        bad_mode ();
 }
@@ -175,6 +213,7 @@ void do_not_used (struct pt_regs *pt_regs)
 void do_fiq (struct pt_regs *pt_regs)
 {
        printf ("fast interrupt request\n");
+       fixup_pc(pt_regs, -8);
        show_regs (pt_regs);
        bad_mode ();
 }
@@ -183,6 +222,7 @@ void do_fiq (struct pt_regs *pt_regs)
 void do_irq (struct pt_regs *pt_regs)
 {
        printf ("interrupt request\n");
+       fixup_pc(pt_regs, -8);
        show_regs (pt_regs);
        bad_mode ();
 }