diff options
Diffstat (limited to 'gnu/packages/patches/jamvm-2.0.0-aarch64-support.patch')
| -rw-r--r-- | gnu/packages/patches/jamvm-2.0.0-aarch64-support.patch | 645 |
1 files changed, 645 insertions, 0 deletions
diff --git a/gnu/packages/patches/jamvm-2.0.0-aarch64-support.patch b/gnu/packages/patches/jamvm-2.0.0-aarch64-support.patch new file mode 100644 index 0000000000..b67d8b4584 --- /dev/null +++ b/gnu/packages/patches/jamvm-2.0.0-aarch64-support.patch @@ -0,0 +1,645 @@ +From a44154f7a18496cc3e5fc0b1b2ea69523ebc623a Mon Sep 17 00:00:00 2001 +From: Simon South <simon@simonsouth.net> +Date: Mon, 1 Jun 2020 07:09:34 -0400 +Subject: [PATCH] Add support for aarch64 on GNU/Linux + +--- + AUTHORS | 1 + + README | 2 +- + configure.ac | 7 +- + src/arch/Makefile.am | 2 +- + src/arch/aarch64.h | 147 +++++++++++++++++++++ + src/jam.c | 3 +- + src/os/linux/Makefile.am | 2 +- + src/os/linux/aarch64/Makefile.am | 28 ++++ + src/os/linux/aarch64/callNative.S | 212 ++++++++++++++++++++++++++++++ + src/os/linux/aarch64/dll_md.c | 59 +++++++++ + src/os/linux/aarch64/init.c | 51 +++++++ + 11 files changed, 508 insertions(+), 6 deletions(-) + create mode 100644 src/arch/aarch64.h + create mode 100644 src/os/linux/aarch64/Makefile.am + create mode 100644 src/os/linux/aarch64/callNative.S + create mode 100644 src/os/linux/aarch64/dll_md.c + create mode 100644 src/os/linux/aarch64/init.c + +diff --git a/AUTHORS b/AUTHORS +index e1334fe..6fd0eeb 100644 +--- a/AUTHORS ++++ b/AUTHORS +@@ -1 +1,2 @@ + Robert Lougher <rob@jamvm.org.uk> ++Simon South <simon@simonsouth.net> +diff --git a/README b/README +index c9d80bb..0e93d00 100644 +--- a/README ++++ b/README +@@ -77,7 +77,7 @@ versions of JamVM also includes stubs for common method signatures. + The following platforms/architectures are recognised by configure. Those + marked with * must be configured to use libffi. + +-- Linux: x86, x86_64, ARM, PowerPC, PowerPC64(*), MIPS, HPPA ++- Linux: x86, x86_64, ARM, ARM64, PowerPC, PowerPC64(*), MIPS, HPPA + - FreeBSD: x86, x86_64, ARM, PowerPC, PowerPC64(*), SPARC(*) + - OpenBSD: x86, x86_64, ARM, PowerPC, PowerPC64(*), SPARC(*) + - Mac OS X/Darwin: x86, x86_64, ARM, PowerPC, PowerPC64 +diff --git a/configure.ac b/configure.ac +index 138b7e6..e7051d7 100644 +--- a/configure.ac ++++ b/configure.ac +@@ -46,6 +46,7 @@ x86_64-*-freebsd*) host_os=bsd libdl_needed=no ;; + arm*-*-linux*) host_cpu=arm host_os=linux interp_cflags=-marm ;; + arm*-*-openbsd*) host_cpu=arm host_os=bsd libdl_needed=no ;; + arm*-*-freebsd*) host_cpu=arm host_os=bsd libdl_needed=no ;; ++aarch64*-*-linux*) host_cpu=aarch64 host_os=linux ;; + powerpc*-*-linux*) host_cpu=powerpc host_os=linux ;; + powerpc*-*-openbsd*) host_cpu=powerpc host_os=bsd libdl_needed=no ;; + powerpc*-*-freebsd*) host_cpu=powerpc host_os=bsd libdl_needed=no ;; +@@ -155,10 +156,11 @@ AC_ARG_ENABLE(runtime-reloc-checks, + + AC_ARG_ENABLE(int-inlining, + [AS_HELP_STRING(--enable-int-inlining,enable inline threaded version of the interpreter +- (by default enabled on x86_64, i386, powerpc, mips and arm, ++ (by default enabled on x86_64, i386, powerpc, mips, arm and aarch64, + disabled otherwise))],, + [if test "$host_cpu" = x86_64 -o "$host_cpu" = i386 -o "$host_cpu" = x86 -o \ +- "$host_cpu" = powerpc -o "$host_cpu" = arm -o "$host_cpu" = mips; then ++ "$host_cpu" = powerpc -o "$host_cpu" = arm -o "$host_cpu" = mips -o \ ++ "$host_cpu" = aarch64; then + enable_int_inlining=yes + else + enable_int_inlining=no +@@ -407,6 +409,7 @@ AC_CONFIG_FILES( + src/os/linux/x86_64/Makefile \ + src/os/linux/parisc/Makefile \ + src/os/linux/mips/Makefile \ ++ src/os/linux/aarch64/Makefile \ + src/os/darwin/i386/Makefile \ + src/os/darwin/arm/Makefile \ + src/os/darwin/powerpc/Makefile \ +diff --git a/src/arch/Makefile.am b/src/arch/Makefile.am +index 7580a1b..4e2a4f9 100644 +--- a/src/arch/Makefile.am ++++ b/src/arch/Makefile.am +@@ -19,4 +19,4 @@ + ## Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + ## + +-EXTRA_DIST = powerpc.h arm.h i386.h x86_64.h parisc.h mips.h sparc.h ++EXTRA_DIST = powerpc.h arm.h i386.h x86_64.h parisc.h mips.h sparc.h aarch64.h +diff --git a/src/arch/aarch64.h b/src/arch/aarch64.h +new file mode 100644 +index 0000000..1912e79 +--- /dev/null ++++ b/src/arch/aarch64.h +@@ -0,0 +1,147 @@ ++/* ++ * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 ++ * Robert Lougher <rob@jamvm.org.uk>. ++ * Copyright (C) 2020 Simon South <simon@simonsouth.net>. ++ * ++ * This file is part of JamVM. ++ * ++ * This program is free software; you can redistribute it and/or ++ * modify it under the terms of the GNU General Public License ++ * as published by the Free Software Foundation; either version 2, ++ * or (at your option) any later version. ++ * ++ * This program is distributed in the hope that it will be useful, ++ * but WITHOUT ANY WARRANTY; without even the implied warranty of ++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ++ * GNU General Public License for more details. ++ * ++ * You should have received a copy of the GNU General Public License ++ * along with this program; if not, write to the Free Software ++ * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. ++ */ ++ ++#include <stdint.h> ++ ++#define OS_ARCH "aarch64" ++ ++#define HANDLER_TABLE_T static const void ++#define DOUBLE_1_BITS 0x3ff0000000000000LL ++ ++#define READ_DBL(v,p,l) v = ((u8)p[0]<<56)|((u8)p[1]<<48)|((u8)p[2]<<40) \ ++ |((u8)p[3]<<32)|((u8)p[4]<<24)|((u8)p[5]<<16) \ ++ |((u8)p[6]<<8)|(u8)p[7]; p+=8 ++ ++/* Needed for i386 -- empty here */ ++#define FPU_HACK ++ ++#define COMPARE_AND_SWAP_64(addr, old_val, new_val) \ ++({ \ ++ int result, read_val; \ ++ __asm__ __volatile__ (" \ ++ 1: ldaxr %2, %1; \ ++ cmp %2, %3; \ ++ b.ne 2f; \ ++ stlxr %w0, %4, %1; \ ++ cmp %w0, wzr; \ ++ b.ne 1b; \ ++ 2: cset %w0, eq;" \ ++ : "=&r" (result), "+Q" (*addr), "=&r" (read_val) \ ++ : "r" (old_val), "r" (new_val) \ ++ : "cc"); \ ++ result; \ ++}) ++ ++#define COMPARE_AND_SWAP_32(addr, old_val, new_val) \ ++({ \ ++ int result, read_val; \ ++ __asm__ __volatile__ (" \ ++ 1: ldaxr %w2, %1; \ ++ cmp %w2, %w3; \ ++ b.ne 2f; \ ++ stlxr %w0, %w4, %1; \ ++ cmp %w0, wzr; \ ++ b.ne 1b; \ ++ 2: cset %w0, eq;" \ ++ : "=&r" (result), "+Q" (*addr), "=&r" (read_val) \ ++ : "r" (old_val), "r" (new_val) \ ++ : "cc"); \ ++ result; \ ++}) ++ ++#define COMPARE_AND_SWAP(addr, old_val, new_val) \ ++ COMPARE_AND_SWAP_64(addr, old_val, new_val) ++ ++#define LOCKWORD_READ(addr) \ ++({ \ ++ uintptr_t result; \ ++ __asm__ __volatile__ (" \ ++ ldar %0, %1;" \ ++ : "=r" (result) \ ++ : "Q" (*addr) \ ++ : "cc"); \ ++ result; \ ++}) ++ ++#define LOCKWORD_WRITE(addr, value) \ ++({ \ ++ __asm__ __volatile__ (" \ ++ stlr %1, %0;" \ ++ : "=Q" (*addr) \ ++ : "r" (value) \ ++ : "cc"); \ ++}) ++ ++#define LOCKWORD_COMPARE_AND_SWAP(addr, old_val, new_val) \ ++ COMPARE_AND_SWAP_64(addr, old_val, new_val) ++ ++#define FLUSH_CACHE(addr, length) \ ++{ \ ++ uintptr_t start = (uintptr_t) (addr); \ ++ uintptr_t end = start + length; \ ++ uintptr_t i; \ ++ \ ++ for(i = start & aarch64_data_cache_line_mask; \ ++ i < end; \ ++ i += aarch64_data_cache_line_len) \ ++ __asm__ ("dc cvau, %0" :: "r" (i)); \ ++ \ ++ __asm__ ("dsb ish"); \ ++ \ ++ for(i = start & aarch64_instruction_cache_line_mask; \ ++ i < end; \ ++ i += aarch64_instruction_cache_line_len) \ ++ __asm__ ("ic ivau, %0" :: "r" (i)); \ ++ \ ++ __asm__ ("dsb ish; isb"); \ ++} ++ ++#define GEN_REL_JMP(target_addr, patch_addr, patch_size) \ ++({ \ ++ int patched = FALSE; \ ++ \ ++ if(patch_size >= 4) { \ ++ /* Guard against the pointer difference being \ ++ larger than the signed range */ \ ++ long long offset = (uintptr_t)(target_addr) - \ ++ (uintptr_t)(patch_addr); \ ++ \ ++ if(offset >= -1<<28 && offset < 1<<28) { \ ++ *(uint32_t*)(patch_addr) = offset>>2 & 0x03ffffff \ ++ | 0x14000000; \ ++ patched = TRUE; \ ++ } \ ++ } \ ++ patched; \ ++}) ++ ++#define MBARRIER() __asm__ ("dmb ish" ::: "memory") ++#define RMBARRIER() __asm__ ("dmb ishld" ::: "memory") ++#define WMBARRIER() __asm__ ("dmb ishst" ::: "memory") ++#define JMM_LOCK_MBARRIER() __asm__ ("dmb ish" ::: "memory") ++#define JMM_UNLOCK_MBARRIER() JMM_LOCK_MBARRIER() ++ ++/* Defined in src/os/linux/aarch64/init.c */ ++extern unsigned char aarch64_data_cache_line_len; ++extern uintptr_t aarch64_data_cache_line_mask; ++extern unsigned char aarch64_instruction_cache_line_len; ++extern uintptr_t aarch64_instruction_cache_line_mask; +diff --git a/src/jam.c b/src/jam.c +index 052f84a..c97524a 100644 +--- a/src/jam.c ++++ b/src/jam.c +@@ -98,7 +98,8 @@ void showUsage(char *name) { + void showVersionAndCopyright() { + printf("java version \"%s\"\n", JAVA_COMPAT_VERSION); + printf("JamVM version %s\n", VERSION); +- printf("Copyright (C) 2003-2014 Robert Lougher <rob@jamvm.org.uk>\n\n"); ++ printf("Copyright (C) 2003-2014 Robert Lougher <rob@jamvm.org.uk>\n"); ++ printf("Portions Copyright (C) 2020 Simon South <simon@simonsouth.net>\n\n"); + printf("This program is free software; you can redistribute it and/or\n"); + printf("modify it under the terms of the GNU General Public License\n"); + printf("as published by the Free Software Foundation; either version 2,\n"); +diff --git a/src/os/linux/Makefile.am b/src/os/linux/Makefile.am +index 542094e..83e7dfe 100644 +--- a/src/os/linux/Makefile.am ++++ b/src/os/linux/Makefile.am +@@ -20,7 +20,7 @@ + ## + + SUBDIRS = @arch@ +-DIST_SUBDIRS = powerpc arm i386 x86_64 parisc mips ++DIST_SUBDIRS = powerpc arm i386 x86_64 parisc mips aarch64 + + noinst_LTLIBRARIES = libos.la + libos_la_SOURCES = os.c +diff --git a/src/os/linux/aarch64/Makefile.am b/src/os/linux/aarch64/Makefile.am +new file mode 100644 +index 0000000..0e5134f +--- /dev/null ++++ b/src/os/linux/aarch64/Makefile.am +@@ -0,0 +1,28 @@ ++## ++## Copyright (C) 2003, 2004, 2005, 2006, 2007, 2010, 2011, 2012 ++## Robert Lougher <rob@jamvm.org.uk>. ++## ++## File added by Simon South <simon@simonsouth.net>. ++## ++## This file is part of JamVM. ++## ++## This program is free software; you can redistribute it and/or ++## modify it under the terms of the GNU General Public License ++## as published by the Free Software Foundation; either version 2, ++## or (at your option) any later version. ++## ++## This program is distributed in the hope that it will be useful, ++## but WITHOUT ANY WARRANTY; without even the implied warranty of ++## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ++## GNU General Public License for more details. ++## ++## You should have received a copy of the GNU General Public License ++## along with this program; if not, write to the Free Software ++## Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. ++## ++ ++noinst_LTLIBRARIES = libnative.la ++libnative_la_SOURCES = init.c dll_md.c callNative.S ++ ++AM_CPPFLAGS = -I$(top_builddir)/src -I$(top_srcdir)/src ++AM_CCASFLAGS = -I$(top_builddir)/src +diff --git a/src/os/linux/aarch64/callNative.S b/src/os/linux/aarch64/callNative.S +new file mode 100644 +index 0000000..e067c4f +--- /dev/null ++++ b/src/os/linux/aarch64/callNative.S +@@ -0,0 +1,212 @@ ++/* ++ * Copyright (C) 2008, 2009, 2011, 2012 Robert Lougher <rob@jamvm.org.uk>. ++ * Copyright (C) 2020 Simon South <simon@simonsouth.net>. ++ * ++ * This file is part of JamVM. ++ * ++ * This program is free software; you can redistribute it and/or ++ * modify it under the terms of the GNU General Public License ++ * as published by the Free Software Foundation; either version 2, ++ * or (at your option) any later version. ++ * ++ * This program is distributed in the hope that it will be useful, ++ * but WITHOUT ANY WARRANTY; without even the implied warranty of ++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ++ * GNU General Public License for more details. ++ * ++ * You should have received a copy of the GNU General Public License ++ * along with this program; if not, write to the Free Software ++ * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. ++ */ ++ ++#include "config.h" ++ ++#ifndef USE_FFI ++ .text ++ .arch armv8-a ++ .align 2 ++ .global callJNIMethod ++ .type callJNIMethod,function ++ ++/* ++ * Arguments passed in: ++ * ++ * x0 JNIEnv ++ * x1 class or NULL ++ * x2 sig ++ * w3 extra arg ++ * x4 ostack ++ * x5 function pntr ++ * w6 args count ++ */ ++ ++/* Register usage: ++ * ++ * x20 ostack ++ * x19 sig pntr ++ * x16 function pntr ++ * x15 ostack pntr ++ * x14 args pntr ++ * x13 float/double handler ++ * x12 int/long handler ++ * w11 fp regs remaining ++ * w10 int regs remaining ++ * x9 scratch ++ * x2-x7 outgoing int args ++ * x1 outgoing class or this pntr ++ * x0 outgoing JNIEnv (as passed in) ++ * ++ * d0 - d7 outgoing float args ++ */ ++ ++callJNIMethod: ++ stp x29, x30, [sp, #-32]! ++ mov x29, sp ++ stp x19, x20, [x29, #16] ++ ++ sub sp, sp, w3 /* allocate room for stacked args */ ++ mov x14, sp ++ ++ mov x20, x4 /* preserve ostack */ ++ add x19, x2, #1 /* init sig pntr -- skipping '(' */ ++ ++ mov x16, x5 /* save function pntr */ ++ mov x15, x20 /* init ostack pntr */ ++ ++ adr x13, fp_reg_handlers-8 ++ adr x12, int_reg_handlers-8 ++ ++ mov w11, #8 /* fp regs remaining */ ++ mov w10, #6 /* int regs remaining */ ++ ++ cbnz x1, scan_sig /* is method non-static? */ ++ ldr x1, [x15], #8 /* yes, load x1 with "this" */ ++ ++scan_sig: ++ ldrb w9, [x19], #1 /* get next sig char */ ++ ++ cmp w9, #41 /* ')' */ ++ b.eq done ++ ++ cmp w9, #74 /* 'J' */ ++ b.eq long ++ ++ cmp w9, #70 /* 'F' */ ++ b.eq float ++ ++ cmp w9, #68 /* 'D' */ ++ b.eq double ++ ++skip_brackets: ++ cmp w9, #91 /* '[' */ ++ b.ne 1f ++ ldrb w9, [x19], #1 ++ b skip_brackets ++1: ++ cmp w9, #76 /* 'L' */ ++ b.ne int ++ ++skip_ref: ++ ldrb w9, [x19], #1 ++ cmp w9, #59 /* ';' */ ++ b.ne skip_ref ++ ++int: ++ ldr x9, [x15], #8 ++ cbz w10, stack_push ++ ++load_int_reg: ++ sub w10, w10, #1 ++ add x12, x12, #8 ++ br x12 ++ ++int_reg_handlers: ++ mov x2, x9 ++ b scan_sig ++ mov x3, x9 ++ b scan_sig ++ mov x4, x9 ++ b scan_sig ++ mov x5, x9 ++ b scan_sig ++ mov x6, x9 ++ b scan_sig ++ mov x7, x9 ++ b scan_sig ++ ++long: ++ ldr x9, [x15], #16 ++ cbz w10, stack_push ++ b load_int_reg ++ ++float: ++ ldr w9, [x15], #8 ++ cbz w11, stack_push ++ b load_fp_reg ++ ++double: ++ ldr x9, [x15], #16 ++ cbz w11, stack_push ++ ++load_fp_reg: ++ sub w11, w11, #1 ++ add x13, x13, #8 ++ br x13 ++ ++fp_reg_handlers: ++ fmov d0, x9 ++ b scan_sig ++ fmov d1, x9 ++ b scan_sig ++ fmov d2, x9 ++ b scan_sig ++ fmov d3, x9 ++ b scan_sig ++ fmov d4, x9 ++ b scan_sig ++ fmov d5, x9 ++ b scan_sig ++ fmov d6, x9 ++ b scan_sig ++ fmov d7, x9 ++ b scan_sig ++ ++stack_push: ++ str x9, [x14], #8 ++ b scan_sig ++ ++done: ++ /* Call the function */ ++ blr x16 ++ ++ mov sp, x29 /* Pop argument area */ ++ ++ ldrb w9, [x19] /* Return type */ ++ ++ cmp w9, #86 /* 'V' */ ++ b.eq return ++ ++ cmp w9, #68 /* 'D' */ ++ b.ne 2f ++ str d0, [x20], #16 ++ b return ++2: ++ cmp w9, #70 /* 'F' */ ++ b.ne 3f ++ str s0, [x20], #8 ++ b return ++3: ++ cmp w9, #74 /* 'J' */ ++ b.ne 4f ++ str x0, [x20], #16 ++ b return ++4: ++ str x0, [x20], #8 ++ ++return: ++ mov x0, x20 /* return ostack */ ++ ++ ldp x19, x20, [x29, #16] ++ ldp x29, x30, [sp], #32 ++ ret ++#endif +diff --git a/src/os/linux/aarch64/dll_md.c b/src/os/linux/aarch64/dll_md.c +new file mode 100644 +index 0000000..189f8a8 +--- /dev/null ++++ b/src/os/linux/aarch64/dll_md.c +@@ -0,0 +1,59 @@ ++/* ++ * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2010, 2011 ++ * Robert Lougher <rob@jamvm.org.uk>. ++ * Copyright (C) 2020 Simon South <simon@simonsouth.net>. ++ * ++ * This file is part of JamVM. ++ * ++ * This program is free software; you can redistribute it and/or ++ * modify it under the terms of the GNU General Public License ++ * as published by the Free Software Foundation; either version 2, ++ * or (at your option) any later version. ++ * ++ * This program is distributed in the hope that it will be useful, ++ * but WITHOUT ANY WARRANTY; without even the implied warranty of ++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ++ * GNU General Public License for more details. ++ * ++ * You should have received a copy of the GNU General Public License ++ * along with this program; if not, write to the Free Software ++ * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. ++ */ ++ ++#include "jam.h" ++ ++#ifndef USE_FFI ++ ++int nativeExtraArg(MethodBlock *mb) { ++ char *sig = mb->type; ++ int stack_args = 0; ++ int int_args = 6; ++ int fp_args = 8; ++ ++ while(*++sig != ')') ++ switch(*sig) { ++ case 'F': ++ case 'D': ++ if(fp_args == 0) ++ stack_args += 8; ++ else ++ fp_args--; ++ ++ default: ++ if(int_args == 0) ++ stack_args += 8; ++ else ++ int_args--; ++ ++ if(*sig == '[') ++ while(*++sig == '['); ++ if(*sig == 'L') ++ while(*++sig != ';'); ++ break; ++ } ++ ++ /* Ensure the stack remains 16 byte aligned. */ ++ return (stack_args + 15) & ~15; ++} ++ ++#endif +diff --git a/src/os/linux/aarch64/init.c b/src/os/linux/aarch64/init.c +new file mode 100644 +index 0000000..b21dc55 +--- /dev/null ++++ b/src/os/linux/aarch64/init.c +@@ -0,0 +1,51 @@ ++/* ++ * Copyright (C) 2003, 2004, 2005, 2006, 2007 ++ * Robert Lougher <rob@jamvm.org.uk>. ++ * Copyright (C) 2020 Simon South <simon@simonsouth.net>. ++ * ++ * This file is part of JamVM. ++ * ++ * This program is free software; you can redistribute it and/or ++ * modify it under the terms of the GNU General Public License ++ * as published by the Free Software Foundation; either version 2, ++ * or (at your option) any later version. ++ * ++ * This program is distributed in the hope that it will be useful, ++ * but WITHOUT ANY WARRANTY; without even the implied warranty of ++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ++ * GNU General Public License for more details. ++ * ++ * You should have received a copy of the GNU General Public License ++ * along with this program; if not, write to the Free Software ++ * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. ++ */ ++ ++#include "arch/aarch64.h" ++ ++/* Length in bytes of the smallest line in the host system's data cache */ ++unsigned char aarch64_data_cache_line_len; ++ ++/* Mask used to align a virtual address to a line in the data cache */ ++uintptr_t aarch64_data_cache_line_mask; ++ ++/* Length in bytes of the smallest line in the host system's instruction ++ cache */ ++unsigned char aarch64_instruction_cache_line_len; ++ ++/* Mask used to align a virtual address to a line in the instruction cache */ ++uintptr_t aarch64_instruction_cache_line_mask; ++ ++void initialisePlatform() { ++ unsigned int cache_type; ++ ++ /* Extract information from the cache-type register, which describes aspects ++ of the host's cache configuration */ ++ __asm__ ("mrs %0, ctr_el0" : "=r" (cache_type)); ++ ++ aarch64_data_cache_line_len = 4 << ((cache_type >> 16) & 0x0f); ++ aarch64_data_cache_line_mask = ~(aarch64_data_cache_line_len - 1); ++ ++ aarch64_instruction_cache_line_len = 4 << (cache_type & 0x0f); ++ aarch64_instruction_cache_line_mask = ++ ~(aarch64_instruction_cache_line_len - 1); ++} +-- +2.26.2 + |