mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
298 lines
9.6 KiB
298 lines
9.6 KiB
/* SPDX-License-Identifier: GPL-2.0-or-later */ |
|
#ifndef __ASM_POWERPC_FEATURE_FIXUPS_H |
|
#define __ASM_POWERPC_FEATURE_FIXUPS_H |
|
|
|
#include <asm/asm-const.h> |
|
|
|
/* |
|
*/ |
|
|
|
/* |
|
* Feature section common macros |
|
* |
|
* Note that the entries now contain offsets between the table entry |
|
* and the code rather than absolute code pointers in order to be |
|
* useable with the vdso shared library. There is also an assumption |
|
* that values will be negative, that is, the fixup table has to be |
|
* located after the code it fixes up. |
|
*/ |
|
#if defined(CONFIG_PPC64) && !defined(__powerpc64__) |
|
/* 64 bits kernel, 32 bits code (ie. vdso32) */ |
|
#define FTR_ENTRY_LONG .8byte |
|
#define FTR_ENTRY_OFFSET .long 0xffffffff; .long |
|
#elif defined(CONFIG_PPC64) |
|
#define FTR_ENTRY_LONG .8byte |
|
#define FTR_ENTRY_OFFSET .8byte |
|
#else |
|
#define FTR_ENTRY_LONG .long |
|
#define FTR_ENTRY_OFFSET .long |
|
#endif |
|
|
|
#define START_FTR_SECTION(label) label##1: |
|
|
|
#define FTR_SECTION_ELSE_NESTED(label) \ |
|
label##2: \ |
|
.pushsection __ftr_alt_##label,"a"; \ |
|
.align 2; \ |
|
label##3: |
|
|
|
|
|
#ifndef CONFIG_CC_IS_CLANG |
|
#define CHECK_ALT_SIZE(else_size, body_size) \ |
|
.ifgt (else_size) - (body_size); \ |
|
.error "Feature section else case larger than body"; \ |
|
.endif; |
|
#else |
|
/* |
|
* If we use the ifgt syntax above, clang's assembler complains about the |
|
* expression being non-absolute when the code appears in an inline assembly |
|
* statement. |
|
* As a workaround use an .org directive that has no effect if the else case |
|
* instructions are smaller than the body, but fails otherwise. |
|
*/ |
|
#define CHECK_ALT_SIZE(else_size, body_size) \ |
|
.org . + ((else_size) > (body_size)); |
|
#endif |
|
|
|
#define MAKE_FTR_SECTION_ENTRY(msk, val, label, sect) \ |
|
label##4: \ |
|
.popsection; \ |
|
.pushsection sect,"a"; \ |
|
.align 3; \ |
|
label##5: \ |
|
FTR_ENTRY_LONG msk; \ |
|
FTR_ENTRY_LONG val; \ |
|
FTR_ENTRY_OFFSET label##1b-label##5b; \ |
|
FTR_ENTRY_OFFSET label##2b-label##5b; \ |
|
FTR_ENTRY_OFFSET label##3b-label##5b; \ |
|
FTR_ENTRY_OFFSET label##4b-label##5b; \ |
|
CHECK_ALT_SIZE((label##4b-label##3b), (label##2b-label##1b)); \ |
|
.popsection; |
|
|
|
|
|
/* CPU feature dependent sections */ |
|
#define BEGIN_FTR_SECTION_NESTED(label) START_FTR_SECTION(label) |
|
#define BEGIN_FTR_SECTION START_FTR_SECTION(97) |
|
|
|
#define END_FTR_SECTION_NESTED(msk, val, label) \ |
|
FTR_SECTION_ELSE_NESTED(label) \ |
|
MAKE_FTR_SECTION_ENTRY(msk, val, label, __ftr_fixup) |
|
|
|
#define END_FTR_SECTION(msk, val) \ |
|
END_FTR_SECTION_NESTED(msk, val, 97) |
|
|
|
#define END_FTR_SECTION_NESTED_IFSET(msk, label) \ |
|
END_FTR_SECTION_NESTED((msk), (msk), label) |
|
|
|
#define END_FTR_SECTION_IFSET(msk) END_FTR_SECTION((msk), (msk)) |
|
#define END_FTR_SECTION_IFCLR(msk) END_FTR_SECTION((msk), 0) |
|
|
|
/* CPU feature sections with alternatives, use BEGIN_FTR_SECTION to start */ |
|
#define FTR_SECTION_ELSE FTR_SECTION_ELSE_NESTED(97) |
|
#define ALT_FTR_SECTION_END_NESTED(msk, val, label) \ |
|
MAKE_FTR_SECTION_ENTRY(msk, val, label, __ftr_fixup) |
|
#define ALT_FTR_SECTION_END_NESTED_IFSET(msk, label) \ |
|
ALT_FTR_SECTION_END_NESTED(msk, msk, label) |
|
#define ALT_FTR_SECTION_END_NESTED_IFCLR(msk, label) \ |
|
ALT_FTR_SECTION_END_NESTED(msk, 0, label) |
|
#define ALT_FTR_SECTION_END(msk, val) \ |
|
ALT_FTR_SECTION_END_NESTED(msk, val, 97) |
|
#define ALT_FTR_SECTION_END_IFSET(msk) \ |
|
ALT_FTR_SECTION_END_NESTED_IFSET(msk, 97) |
|
#define ALT_FTR_SECTION_END_IFCLR(msk) \ |
|
ALT_FTR_SECTION_END_NESTED_IFCLR(msk, 97) |
|
|
|
/* MMU feature dependent sections */ |
|
#define BEGIN_MMU_FTR_SECTION_NESTED(label) START_FTR_SECTION(label) |
|
#define BEGIN_MMU_FTR_SECTION START_FTR_SECTION(97) |
|
|
|
#define END_MMU_FTR_SECTION_NESTED(msk, val, label) \ |
|
FTR_SECTION_ELSE_NESTED(label) \ |
|
MAKE_FTR_SECTION_ENTRY(msk, val, label, __mmu_ftr_fixup) |
|
|
|
#define END_MMU_FTR_SECTION(msk, val) \ |
|
END_MMU_FTR_SECTION_NESTED(msk, val, 97) |
|
|
|
#define END_MMU_FTR_SECTION_NESTED_IFSET(msk, label) \ |
|
END_MMU_FTR_SECTION_NESTED((msk), (msk), label) |
|
|
|
#define END_MMU_FTR_SECTION_NESTED_IFCLR(msk, label) \ |
|
END_MMU_FTR_SECTION_NESTED((msk), 0, label) |
|
|
|
#define END_MMU_FTR_SECTION_IFSET(msk) END_MMU_FTR_SECTION((msk), (msk)) |
|
#define END_MMU_FTR_SECTION_IFCLR(msk) END_MMU_FTR_SECTION((msk), 0) |
|
|
|
/* MMU feature sections with alternatives, use BEGIN_FTR_SECTION to start */ |
|
#define MMU_FTR_SECTION_ELSE_NESTED(label) FTR_SECTION_ELSE_NESTED(label) |
|
#define MMU_FTR_SECTION_ELSE MMU_FTR_SECTION_ELSE_NESTED(97) |
|
#define ALT_MMU_FTR_SECTION_END_NESTED(msk, val, label) \ |
|
MAKE_FTR_SECTION_ENTRY(msk, val, label, __mmu_ftr_fixup) |
|
#define ALT_MMU_FTR_SECTION_END_NESTED_IFSET(msk, label) \ |
|
ALT_MMU_FTR_SECTION_END_NESTED(msk, msk, label) |
|
#define ALT_MMU_FTR_SECTION_END_NESTED_IFCLR(msk, label) \ |
|
ALT_MMU_FTR_SECTION_END_NESTED(msk, 0, label) |
|
#define ALT_MMU_FTR_SECTION_END(msk, val) \ |
|
ALT_MMU_FTR_SECTION_END_NESTED(msk, val, 97) |
|
#define ALT_MMU_FTR_SECTION_END_IFSET(msk) \ |
|
ALT_MMU_FTR_SECTION_END_NESTED_IFSET(msk, 97) |
|
#define ALT_MMU_FTR_SECTION_END_IFCLR(msk) \ |
|
ALT_MMU_FTR_SECTION_END_NESTED_IFCLR(msk, 97) |
|
|
|
/* Firmware feature dependent sections */ |
|
#define BEGIN_FW_FTR_SECTION_NESTED(label) START_FTR_SECTION(label) |
|
#define BEGIN_FW_FTR_SECTION START_FTR_SECTION(97) |
|
|
|
#define END_FW_FTR_SECTION_NESTED(msk, val, label) \ |
|
FTR_SECTION_ELSE_NESTED(label) \ |
|
MAKE_FTR_SECTION_ENTRY(msk, val, label, __fw_ftr_fixup) |
|
|
|
#define END_FW_FTR_SECTION(msk, val) \ |
|
END_FW_FTR_SECTION_NESTED(msk, val, 97) |
|
|
|
#define END_FW_FTR_SECTION_IFSET(msk) END_FW_FTR_SECTION((msk), (msk)) |
|
#define END_FW_FTR_SECTION_IFCLR(msk) END_FW_FTR_SECTION((msk), 0) |
|
|
|
/* Firmware feature sections with alternatives */ |
|
#define FW_FTR_SECTION_ELSE_NESTED(label) FTR_SECTION_ELSE_NESTED(label) |
|
#define FW_FTR_SECTION_ELSE FTR_SECTION_ELSE_NESTED(97) |
|
#define ALT_FW_FTR_SECTION_END_NESTED(msk, val, label) \ |
|
MAKE_FTR_SECTION_ENTRY(msk, val, label, __fw_ftr_fixup) |
|
#define ALT_FW_FTR_SECTION_END_NESTED_IFSET(msk, label) \ |
|
ALT_FW_FTR_SECTION_END_NESTED(msk, msk, label) |
|
#define ALT_FW_FTR_SECTION_END_NESTED_IFCLR(msk, label) \ |
|
ALT_FW_FTR_SECTION_END_NESTED(msk, 0, label) |
|
#define ALT_FW_FTR_SECTION_END(msk, val) \ |
|
ALT_FW_FTR_SECTION_END_NESTED(msk, val, 97) |
|
#define ALT_FW_FTR_SECTION_END_IFSET(msk) \ |
|
ALT_FW_FTR_SECTION_END_NESTED_IFSET(msk, 97) |
|
#define ALT_FW_FTR_SECTION_END_IFCLR(msk) \ |
|
ALT_FW_FTR_SECTION_END_NESTED_IFCLR(msk, 97) |
|
|
|
#ifndef __ASSEMBLY__ |
|
|
|
#define ASM_FTR_IF(section_if, section_else, msk, val) \ |
|
stringify_in_c(BEGIN_FTR_SECTION) \ |
|
section_if "; " \ |
|
stringify_in_c(FTR_SECTION_ELSE) \ |
|
section_else "; " \ |
|
stringify_in_c(ALT_FTR_SECTION_END((msk), (val))) |
|
|
|
#define ASM_FTR_IFSET(section_if, section_else, msk) \ |
|
ASM_FTR_IF(section_if, section_else, (msk), (msk)) |
|
|
|
#define ASM_FTR_IFCLR(section_if, section_else, msk) \ |
|
ASM_FTR_IF(section_if, section_else, (msk), 0) |
|
|
|
#define ASM_MMU_FTR_IF(section_if, section_else, msk, val) \ |
|
stringify_in_c(BEGIN_MMU_FTR_SECTION) \ |
|
section_if "; " \ |
|
stringify_in_c(MMU_FTR_SECTION_ELSE) \ |
|
section_else "; " \ |
|
stringify_in_c(ALT_MMU_FTR_SECTION_END((msk), (val))) |
|
|
|
#define ASM_MMU_FTR_IFSET(section_if, section_else, msk) \ |
|
ASM_MMU_FTR_IF(section_if, section_else, (msk), (msk)) |
|
|
|
#define ASM_MMU_FTR_IFCLR(section_if, section_else, msk) \ |
|
ASM_MMU_FTR_IF(section_if, section_else, (msk), 0) |
|
|
|
#endif /* __ASSEMBLY__ */ |
|
|
|
/* LWSYNC feature sections */ |
|
#define START_LWSYNC_SECTION(label) label##1: |
|
#define MAKE_LWSYNC_SECTION_ENTRY(label, sect) \ |
|
label##2: \ |
|
.pushsection sect,"a"; \ |
|
.align 2; \ |
|
label##3: \ |
|
FTR_ENTRY_OFFSET label##1b-label##3b; \ |
|
.popsection; |
|
|
|
#define STF_ENTRY_BARRIER_FIXUP_SECTION \ |
|
953: \ |
|
.pushsection __stf_entry_barrier_fixup,"a"; \ |
|
.align 2; \ |
|
954: \ |
|
FTR_ENTRY_OFFSET 953b-954b; \ |
|
.popsection; |
|
|
|
#define STF_EXIT_BARRIER_FIXUP_SECTION \ |
|
955: \ |
|
.pushsection __stf_exit_barrier_fixup,"a"; \ |
|
.align 2; \ |
|
956: \ |
|
FTR_ENTRY_OFFSET 955b-956b; \ |
|
.popsection; |
|
|
|
#define UACCESS_FLUSH_FIXUP_SECTION \ |
|
959: \ |
|
.pushsection __uaccess_flush_fixup,"a"; \ |
|
.align 2; \ |
|
960: \ |
|
FTR_ENTRY_OFFSET 959b-960b; \ |
|
.popsection; |
|
|
|
#define ENTRY_FLUSH_FIXUP_SECTION \ |
|
957: \ |
|
.pushsection __entry_flush_fixup,"a"; \ |
|
.align 2; \ |
|
958: \ |
|
FTR_ENTRY_OFFSET 957b-958b; \ |
|
.popsection; |
|
|
|
#define SCV_ENTRY_FLUSH_FIXUP_SECTION \ |
|
957: \ |
|
.pushsection __scv_entry_flush_fixup,"a"; \ |
|
.align 2; \ |
|
958: \ |
|
FTR_ENTRY_OFFSET 957b-958b; \ |
|
.popsection; |
|
|
|
#define RFI_FLUSH_FIXUP_SECTION \ |
|
951: \ |
|
.pushsection __rfi_flush_fixup,"a"; \ |
|
.align 2; \ |
|
952: \ |
|
FTR_ENTRY_OFFSET 951b-952b; \ |
|
.popsection; |
|
|
|
#define NOSPEC_BARRIER_FIXUP_SECTION \ |
|
953: \ |
|
.pushsection __barrier_nospec_fixup,"a"; \ |
|
.align 2; \ |
|
954: \ |
|
FTR_ENTRY_OFFSET 953b-954b; \ |
|
.popsection; |
|
|
|
#define START_BTB_FLUSH_SECTION \ |
|
955: \ |
|
|
|
#define END_BTB_FLUSH_SECTION \ |
|
956: \ |
|
.pushsection __btb_flush_fixup,"a"; \ |
|
.align 2; \ |
|
957: \ |
|
FTR_ENTRY_OFFSET 955b-957b; \ |
|
FTR_ENTRY_OFFSET 956b-957b; \ |
|
.popsection; |
|
|
|
#ifndef __ASSEMBLY__ |
|
#include <linux/types.h> |
|
|
|
extern long stf_barrier_fallback; |
|
extern long entry_flush_fallback; |
|
extern long scv_entry_flush_fallback; |
|
extern long __start___stf_entry_barrier_fixup, __stop___stf_entry_barrier_fixup; |
|
extern long __start___stf_exit_barrier_fixup, __stop___stf_exit_barrier_fixup; |
|
extern long __start___uaccess_flush_fixup, __stop___uaccess_flush_fixup; |
|
extern long __start___entry_flush_fixup, __stop___entry_flush_fixup; |
|
extern long __start___scv_entry_flush_fixup, __stop___scv_entry_flush_fixup; |
|
extern long __start___rfi_flush_fixup, __stop___rfi_flush_fixup; |
|
extern long __start___barrier_nospec_fixup, __stop___barrier_nospec_fixup; |
|
extern long __start__btb_flush_fixup, __stop__btb_flush_fixup; |
|
|
|
void apply_feature_fixups(void); |
|
void setup_feature_keys(void); |
|
#endif |
|
|
|
#endif /* __ASM_POWERPC_FEATURE_FIXUPS_H */
|
|
|