David Abdurachmanov
5f13989674
Note this is already available in 0.4.15 release. Signed-off-by: David Abdurachmanov <david.abdurachmanov@sifive.com>
61 lines
1.7 KiB
Diff
61 lines
1.7 KiB
Diff
From b3e28228b0f5af506f38d1a211ed0794dd66fafe Mon Sep 17 00:00:00 2001
|
|
From: Andreas Schwab <schwab@suse.de>
|
|
Date: Thu, 19 Jul 2018 18:38:31 +0200
|
|
Subject: [PATCH] Add support for RISC-V
|
|
|
|
---
|
|
platform/switch_riscv_unix.h | 32 ++++++++++++++++++++++++++++++++
|
|
slp_platformselect.h | 2 ++
|
|
2 files changed, 34 insertions(+)
|
|
create mode 100644 platform/switch_riscv_unix.h
|
|
|
|
diff --git a/platform/switch_riscv_unix.h b/platform/switch_riscv_unix.h
|
|
new file mode 100644
|
|
index 0000000..5b5ea98
|
|
--- /dev/null
|
|
+++ b/platform/switch_riscv_unix.h
|
|
@@ -0,0 +1,32 @@
|
|
+#define STACK_REFPLUS 1
|
|
+
|
|
+#ifdef SLP_EVAL
|
|
+#define STACK_MAGIC 0
|
|
+
|
|
+#define REGS_TO_SAVE "s0", "s1", "s2", "s3", "s4", "s5", \
|
|
+ "s6", "s7", "s8", "s9", "s10", "s11", "fs0", "fs1", \
|
|
+ "fs2", "fs3", "fs4", "fs5", "fs6", "fs7", "fs8", "fs9", \
|
|
+ "fs10", "fs11"
|
|
+
|
|
+static int
|
|
+slp_switch(void)
|
|
+{
|
|
+ register int ret;
|
|
+ register long *stackref, stsizediff;
|
|
+ __asm__ volatile ("" : : : REGS_TO_SAVE);
|
|
+ __asm__ volatile ("mv %0, sp" : "=r" (stackref) : );
|
|
+ {
|
|
+ SLP_SAVE_STATE(stackref, stsizediff);
|
|
+ __asm__ volatile (
|
|
+ "add sp, sp, %0\n\t"
|
|
+ : /* no outputs */
|
|
+ : "r" (stsizediff)
|
|
+ );
|
|
+ SLP_RESTORE_STATE();
|
|
+ }
|
|
+ __asm__ volatile ("" : : : REGS_TO_SAVE);
|
|
+ __asm__ volatile ("mv %0, zero" : "=r" (ret) : );
|
|
+ return ret;
|
|
+}
|
|
+
|
|
+#endif
|
|
diff --git a/slp_platformselect.h b/slp_platformselect.h
|
|
index e6cdc9f..b52c287 100644
|
|
--- a/slp_platformselect.h
|
|
+++ b/slp_platformselect.h
|
|
@@ -49,4 +49,6 @@
|
|
#include "platform/switch_m68k_gcc.h" /* gcc on m68k */
|
|
#elif defined(__GNUC__) && defined(__csky__)
|
|
#include "platform/switch_csky_gcc.h" /* gcc on csky */
|
|
+#elif defined(__GNUC__) && defined(__riscv)
|
|
+#include "platform/switch_riscv_unix.h" /* gcc on RISC-V */
|
|
#endif
|