diff options
Diffstat (limited to '')
-rw-r--r-- | arch/sparc/power/Makefile | 4 | ||||
-rw-r--r-- | arch/sparc/power/hibernate.c | 40 | ||||
-rw-r--r-- | arch/sparc/power/hibernate_asm.S | 132 |
3 files changed, 176 insertions, 0 deletions
diff --git a/arch/sparc/power/Makefile b/arch/sparc/power/Makefile new file mode 100644 index 0000000000..d8f75e7cb0 --- /dev/null +++ b/arch/sparc/power/Makefile @@ -0,0 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0-only +# Makefile for Sparc-specific hibernate files. + +obj-$(CONFIG_HIBERNATION) += hibernate.o hibernate_asm.o diff --git a/arch/sparc/power/hibernate.c b/arch/sparc/power/hibernate.c new file mode 100644 index 0000000000..47b06f4af1 --- /dev/null +++ b/arch/sparc/power/hibernate.c @@ -0,0 +1,40 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * hibernate.c: Hibernaton support specific for sparc64. + * + * Copyright (C) 2013 Kirill V Tkhai (tkhai@yandex.ru) + */ + +#include <linux/mm.h> + +#include <asm/hibernate.h> +#include <asm/visasm.h> +#include <asm/page.h> +#include <asm/sections.h> +#include <asm/tlb.h> + +struct saved_context saved_context; + +/* + * pfn_is_nosave - check if given pfn is in the 'nosave' section + */ + +int pfn_is_nosave(unsigned long pfn) +{ + unsigned long nosave_begin_pfn = PFN_DOWN((unsigned long)&__nosave_begin); + unsigned long nosave_end_pfn = PFN_DOWN((unsigned long)&__nosave_end); + + return (pfn >= nosave_begin_pfn) && (pfn < nosave_end_pfn); +} + +void save_processor_state(void) +{ + save_and_clear_fpu(); +} + +void restore_processor_state(void) +{ + struct mm_struct *mm = current->active_mm; + + tsb_context_switch_ctx(mm, CTX_HWBITS(mm->context)); +} diff --git a/arch/sparc/power/hibernate_asm.S b/arch/sparc/power/hibernate_asm.S new file mode 100644 index 0000000000..8cfaf5b6a3 --- /dev/null +++ b/arch/sparc/power/hibernate_asm.S @@ -0,0 +1,132 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * hibernate_asm.S: Hibernaton support specific for sparc64. + * + * Copyright (C) 2013 Kirill V Tkhai (tkhai@yandex.ru) + */ + +#include <linux/linkage.h> + +#include <asm/asm-offsets.h> +#include <asm/cpudata.h> +#include <asm/page.h> + +ENTRY(swsusp_arch_suspend) + save %sp, -128, %sp + save %sp, -128, %sp + flushw + + setuw saved_context, %g3 + + /* Save window regs */ + rdpr %cwp, %g2 + stx %g2, [%g3 + SC_REG_CWP] + rdpr %wstate, %g2 + stx %g2, [%g3 + SC_REG_WSTATE] + stx %fp, [%g3 + SC_REG_FP] + + /* Save state regs */ + rdpr %tick, %g2 + stx %g2, [%g3 + SC_REG_TICK] + rdpr %pstate, %g2 + stx %g2, [%g3 + SC_REG_PSTATE] + + /* Save global regs */ + stx %g4, [%g3 + SC_REG_G4] + stx %g5, [%g3 + SC_REG_G5] + stx %g6, [%g3 + SC_REG_G6] + + call swsusp_save + nop + + mov %o0, %i0 + restore + + mov %o0, %i0 + ret + restore + +ENTRY(swsusp_arch_resume) + /* Write restore_pblist to %l0 */ + sethi %hi(restore_pblist), %l0 + ldx [%l0 + %lo(restore_pblist)], %l0 + + call __flush_tlb_all + nop + + /* Write PAGE_OFFSET to %g7 */ + sethi %hi(PAGE_OFFSET), %g7 + ldx [%g7 + %lo(PAGE_OFFSET)], %g7 + + setuw (PAGE_SIZE-8), %g3 + + /* Use MMU Bypass */ + rd %asi, %g1 + wr %g0, ASI_PHYS_USE_EC, %asi + + ba fill_itlb + nop + +pbe_loop: + cmp %l0, %g0 + be restore_ctx + sub %l0, %g7, %l0 + + ldxa [%l0 ] %asi, %l1 /* address */ + ldxa [%l0 + 8] %asi, %l2 /* orig_address */ + + /* phys addr */ + sub %l1, %g7, %l1 + sub %l2, %g7, %l2 + + mov %g3, %l3 /* PAGE_SIZE-8 */ +copy_loop: + ldxa [%l1 + %l3] ASI_PHYS_USE_EC, %g2 + stxa %g2, [%l2 + %l3] ASI_PHYS_USE_EC + cmp %l3, %g0 + bne copy_loop + sub %l3, 8, %l3 + + /* next pbe */ + ba pbe_loop + ldxa [%l0 + 16] %asi, %l0 + +restore_ctx: + setuw saved_context, %g3 + + /* Restore window regs */ + wrpr %g0, 0, %canrestore + wrpr %g0, 0, %otherwin + wrpr %g0, 6, %cansave + wrpr %g0, 0, %cleanwin + + ldxa [%g3 + SC_REG_CWP] %asi, %g2 + wrpr %g2, %cwp + ldxa [%g3 + SC_REG_WSTATE] %asi, %g2 + wrpr %g2, %wstate + ldxa [%g3 + SC_REG_FP] %asi, %fp + + /* Restore state regs */ + ldxa [%g3 + SC_REG_PSTATE] %asi, %g2 + wrpr %g2, %pstate + ldxa [%g3 + SC_REG_TICK] %asi, %g2 + wrpr %g2, %tick + + /* Restore global regs */ + ldxa [%g3 + SC_REG_G4] %asi, %g4 + ldxa [%g3 + SC_REG_G5] %asi, %g5 + ldxa [%g3 + SC_REG_G6] %asi, %g6 + + wr %g1, %g0, %asi + + restore + restore + + wrpr %g0, 14, %pil + + retl + mov %g0, %o0 + +fill_itlb: + ba pbe_loop + wrpr %g0, 15, %pil |