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https://github.com/thead-yocto-mirror/meta-riscv
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28ddbd895b
This will be merged soon, but lets try it out from fork and ensure all testing is done for upstreaming Signed-off-by: Khem Raj <raj.khem@gmail.com>
52 lines
1.6 KiB
Diff
52 lines
1.6 KiB
Diff
From d471b10ce2abe4f3dfec6d24ad0f8ef1fe1070b3 Mon Sep 17 00:00:00 2001
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From: Drew DeVault <sir@cmpwn.com>
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Date: Sun, 16 Dec 2018 10:55:09 -0500
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Subject: [PATCH 2/5] RISC-V: Add cache flush syscall
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---
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arch/riscv32/bits/syscall.h.in | 1 +
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arch/riscv64/bits/syscall.h.in | 1 +
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src/linux/cache.c | 9 +++++++++
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3 files changed, 11 insertions(+)
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diff --git a/arch/riscv32/bits/syscall.h.in b/arch/riscv32/bits/syscall.h.in
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index 3c81c107..11393c29 100644
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--- a/arch/riscv32/bits/syscall.h.in
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+++ b/arch/riscv32/bits/syscall.h.in
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@@ -275,4 +275,5 @@
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#define __NR_pkey_alloc 289
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#define __NR_pkey_free 290
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#define __NR_sysriscv __NR_arch_specific_syscall
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+#define __NR_riscv_flush_icache (__NR_sysriscv + 15)
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diff --git a/arch/riscv64/bits/syscall.h.in b/arch/riscv64/bits/syscall.h.in
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index 3c81c107..11393c29 100644
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--- a/arch/riscv64/bits/syscall.h.in
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+++ b/arch/riscv64/bits/syscall.h.in
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@@ -275,4 +275,5 @@
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#define __NR_pkey_alloc 289
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#define __NR_pkey_free 290
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#define __NR_sysriscv __NR_arch_specific_syscall
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+#define __NR_riscv_flush_icache (__NR_sysriscv + 15)
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diff --git a/src/linux/cache.c b/src/linux/cache.c
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index 84a138a4..4ce919cf 100644
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--- a/src/linux/cache.c
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+++ b/src/linux/cache.c
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@@ -15,3 +15,12 @@ int __cachectl(void *addr, int len, int op)
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}
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weak_alias(__cachectl, cachectl);
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#endif
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+
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+#ifdef SYS_riscv_flush_icache
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+int __riscv_flush_icache(void *start, void *end, unsigned long int flags)
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+{
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+ // TODO: Use vdso
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+ return syscall(SYS_riscv_flush_icache, start, end, flags);
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+}
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+weak_alias(__riscv_flush_icache, riscv_flush_icache);
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+#endif
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--
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2.20.1
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