kernel/arch/int: implement for riscv64

Change-Id: I62d9bff75d35a685983c626720514ff17b1cef00 Reviewed-on: https://review.haiku-os.org/c/haiku/+/4052 Reviewed-by: Alex von Gluck IV <[email protected]>
2021-08-06 17:45:26 +00:00
parent d472f38a49
commit f0e1bca09c
5 changed files with 687 additions and 15 deletions
@@ -10,6 +10,7 @@
 #define _KERNEL_ARCH_RISCV64_INT_H

 #include <SupportDefs.h>
+#include <arch_cpu_defs.h>

 #define NUM_IO_VECTORS	256

@@ -17,30 +18,38 @@
 static inline void
 arch_int_enable_interrupts_inline(void)
 {
-	// TODO: implement
+	// TODO: Use atomic CSRRS?
+	SstatusReg status(Sstatus());
+	status.ie |= (1 << modeS);
+	SetSstatus(status.val);
 }


 static inline int
 arch_int_disable_interrupts_inline(void)
 {
-	// TODO: implement
-	return 0;
+	// TODO: Use atomic CSRRC?
+	SstatusReg status(Sstatus());
+	int oldState = ((1 << modeS) & status.ie) != 0;
+	status.ie &= ~(1 << modeS);
+	SetSstatus(status.val);
+	return oldState;
 }


 static inline void
 arch_int_restore_interrupts_inline(int oldState)
 {
-	// TODO: implement
+	if (oldState)
+		arch_int_enable_interrupts_inline();
 }


 static inline bool
 arch_int_are_interrupts_enabled_inline(void)
 {
-	// TODO: implement
-	return false;
+	SstatusReg status(Sstatus());
+	return ((1 << modeS) & status.ie) != 0;
 }


@@ -53,4 +62,12 @@ arch_int_are_interrupts_enabled_inline(void)
 	arch_int_are_interrupts_enabled_inline()


+enum {
+	kMSyscallSwitchToSmode = 0,
+	kMSyscallSetTimer      = 1,
+};
+
+extern "C" status_t MSyscall(uint64 op, ...);
+
+
 #endif /* _KERNEL_ARCH_RISCV64_INT_H */
@@ -0,0 +1,88 @@
+/*
+ * Copyright 2021, Haiku, Inc.
+ * Distributed under the terms of the MIT License.
+ */
+
+
+#ifndef _ARCH_TRAPS_H_
+#define _ARCH_TRAPS_H_
+
+
+# NOTE: this macro don't save SP, it should be saved manually
+.macro PushTrapFrame
+	addi sp, sp, -256
+
+	sd ra,   0*8(sp)
+	sd t6,   1*8(sp)
+#	sd sp,   2*8(sp) # sp
+	sd gp,   3*8(sp)
+	sd tp,   4*8(sp)
+	sd t0,   5*8(sp)
+	sd t1,   6*8(sp)
+	sd t2,   7*8(sp)
+	sd t5,   8*8(sp)
+	sd s1,   9*8(sp)
+	sd a0,  10*8(sp)
+	sd a1,  11*8(sp)
+	sd a2,  12*8(sp)
+	sd a3,  13*8(sp)
+	sd a4,  14*8(sp)
+	sd a5,  15*8(sp)
+	sd a6,  16*8(sp)
+	sd a7,  17*8(sp)
+	sd s2,  18*8(sp)
+	sd s3,  19*8(sp)
+	sd s4,  20*8(sp)
+	sd s5,  21*8(sp)
+	sd s6,  22*8(sp)
+	sd s7,  23*8(sp)
+	sd s8,  24*8(sp)
+	sd s9,  25*8(sp)
+	sd s10, 26*8(sp)
+	sd s11, 27*8(sp)
+	sd t3,  28*8(sp)
+	sd t4,  29*8(sp)
+	sd fp,  30*8(sp)
+
+	addi fp, sp, 256
+.endm
+
+
+.macro PopTrapFrame
+	ld ra,   0*8(sp)
+	ld t6,   1*8(sp)
+#	ld sp,   2*8(sp) restore later
+	ld gp,   3*8(sp)
+#	ld tp,   4*8(sp)
+	ld t0,   5*8(sp)
+	ld t1,   6*8(sp)
+	ld t2,   7*8(sp)
+	ld t5,   8*8(sp)
+	ld s1,   9*8(sp)
+	ld a0,  10*8(sp)
+	ld a1,  11*8(sp)
+	ld a2,  12*8(sp)
+	ld a3,  13*8(sp)
+	ld a4,  14*8(sp)
+	ld a5,  15*8(sp)
+	ld a6,  16*8(sp)
+	ld a7,  17*8(sp)
+	ld s2,  18*8(sp)
+	ld s3,  19*8(sp)
+	ld s4,  20*8(sp)
+	ld s5,  21*8(sp)
+	ld s6,  22*8(sp)
+	ld s7,  23*8(sp)
+	ld s8,  24*8(sp)
+	ld s9,  25*8(sp)
+	ld s10, 26*8(sp)
+	ld s11, 27*8(sp)
+	ld t3,  28*8(sp)
+	ld t4,  29*8(sp)
+	ld fp,  30*8(sp)
+
+	ld sp,   2*8(sp)
+.endm
+
+
+#endif	// _ARCH_TRAPS_H_