| // SPDX-License-Identifier: GPL-2.0-or-later | |
| /* | |
| */ | |
| #include <linux/kernel.h> | |
| #include <linux/printk.h> | |
| #include <linux/ptrace.h> | |
| #include <asm/reg.h> | |
| #include <asm/cacheflush.h> | |
| int machine_check_440A(struct pt_regs *regs) | |
| { | |
| unsigned long reason = regs->dsisr; | |
| printk("Machine check in kernel mode.\n"); | |
| if (reason & ESR_IMCP){ | |
| printk("Instruction Synchronous Machine Check exception\n"); | |
| mtspr(SPRN_ESR, reason & ~ESR_IMCP); | |
| } | |
| else { | |
| u32 mcsr = mfspr(SPRN_MCSR); | |
| if (mcsr & MCSR_IB) | |
| printk("Instruction Read PLB Error\n"); | |
| if (mcsr & MCSR_DRB) | |
| printk("Data Read PLB Error\n"); | |
| if (mcsr & MCSR_DWB) | |
| printk("Data Write PLB Error\n"); | |
| if (mcsr & MCSR_TLBP) | |
| printk("TLB Parity Error\n"); | |
| if (mcsr & MCSR_ICP){ | |
| flush_instruction_cache(); | |
| printk("I-Cache Parity Error\n"); | |
| } | |
| if (mcsr & MCSR_DCSP) | |
| printk("D-Cache Search Parity Error\n"); | |
| if (mcsr & MCSR_DCFP) | |
| printk("D-Cache Flush Parity Error\n"); | |
| if (mcsr & MCSR_IMPE) | |
| printk("Machine Check exception is imprecise\n"); | |
| /* Clear MCSR */ | |
| mtspr(SPRN_MCSR, mcsr); | |
| } | |
| return 0; | |
| } | |
| #ifdef CONFIG_PPC_47x | |
| int machine_check_47x(struct pt_regs *regs) | |
| { | |
| unsigned long reason = regs->dsisr; | |
| u32 mcsr; | |
| printk(KERN_ERR "Machine check in kernel mode.\n"); | |
| if (reason & ESR_IMCP) { | |
| printk(KERN_ERR "Instruction Synchronous Machine Check exception\n"); | |
| mtspr(SPRN_ESR, reason & ~ESR_IMCP); | |
| return 0; | |
| } | |
| mcsr = mfspr(SPRN_MCSR); | |
| if (mcsr & MCSR_IB) | |
| printk(KERN_ERR "Instruction Read PLB Error\n"); | |
| if (mcsr & MCSR_DRB) | |
| printk(KERN_ERR "Data Read PLB Error\n"); | |
| if (mcsr & MCSR_DWB) | |
| printk(KERN_ERR "Data Write PLB Error\n"); | |
| if (mcsr & MCSR_TLBP) | |
| printk(KERN_ERR "TLB Parity Error\n"); | |
| if (mcsr & MCSR_ICP) { | |
| flush_instruction_cache(); | |
| printk(KERN_ERR "I-Cache Parity Error\n"); | |
| } | |
| if (mcsr & MCSR_DCSP) | |
| printk(KERN_ERR "D-Cache Search Parity Error\n"); | |
| if (mcsr & PPC47x_MCSR_GPR) | |
| printk(KERN_ERR "GPR Parity Error\n"); | |
| if (mcsr & PPC47x_MCSR_FPR) | |
| printk(KERN_ERR "FPR Parity Error\n"); | |
| if (mcsr & PPC47x_MCSR_IPR) | |
| printk(KERN_ERR "Machine Check exception is imprecise\n"); | |
| /* Clear MCSR */ | |
| mtspr(SPRN_MCSR, mcsr); | |
| return 0; | |
| } | |
| #endif /* CONFIG_PPC_47x */ |