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a1f487d75c
Various bits of iop32x are now in their traditional locations in plat-iop, mach-iop/include/mach/ and in include/asm/mach/hardware. As nothing outside of the iop32x mach code references these any more, this can all be moved into one place now. The only remaining things in the include/mach/ directory are now the NR_IRQS definition, the entry-macros.S file and the the decompressor uart access. After the irqchip code has been converted to SPARSE_IRQ and GENERIC_IRQ_MULTI_HANDLER, it can be moved to ARCH_MULTIPLATFORM. Link: https://lore.kernel.org/r/20190809163334.489360-7-arnd@arndb.de Signed-off-by: Arnd Bergmann <arnd@arndb.de>
39 lines
797 B
C
39 lines
797 B
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* IOP Coprocessor-6 access handler
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* Copyright (c) 2006, Intel Corporation.
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*/
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#include <linux/init.h>
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#include <asm/traps.h>
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#include <asm/ptrace.h>
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static int cp6_trap(struct pt_regs *regs, unsigned int instr)
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{
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u32 temp;
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/* enable cp6 access */
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asm volatile (
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"mrc p15, 0, %0, c15, c1, 0\n\t"
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"orr %0, %0, #(1 << 6)\n\t"
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"mcr p15, 0, %0, c15, c1, 0\n\t"
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: "=r"(temp));
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return 0;
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}
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/* permit kernel space cp6 access
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* deny user space cp6 access
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*/
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static struct undef_hook cp6_hook = {
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.instr_mask = 0x0f000ff0,
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.instr_val = 0x0e000610,
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.cpsr_mask = MODE_MASK,
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.cpsr_val = SVC_MODE,
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.fn = cp6_trap,
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};
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void __init iop_init_cp6_handler(void)
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{
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register_undef_hook(&cp6_hook);
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}
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