From 9966b49db468de0168c7a455dfb5b4c66c413c4d Mon Sep 17 00:00:00 2001
From: Kimplul <kimi.h.kuparinen@gmail.com>
Date: Sun, 19 Dec 2021 17:10:36 +0200
Subject: Massive changes to jump to userspace

---
 arch/riscv/include/csr.h  | 36 ++++++++++++++++++++++++++++++++----
 arch/riscv/include/vmem.h |  8 ++++++++
 2 files changed, 40 insertions(+), 4 deletions(-)

(limited to 'arch/riscv/include')

diff --git a/arch/riscv/include/csr.h b/arch/riscv/include/csr.h
index ab25bdd..70e60bb 100644
--- a/arch/riscv/include/csr.h
+++ b/arch/riscv/include/csr.h
@@ -3,11 +3,39 @@
 
 #include <apos/utils.h>
 
-#define SATP_MODE_Sv32 0x80000000
-#define SATP_MODE_Sv39 0x8000000000000000
-#define SATP_MODE_Sv48 0x9000000000000000
+#define SATP_MODE_Sv32	0x80000000
+#define SATP_MODE_Sv39	0x8000000000000000
+#define SATP_MODE_Sv48	0x9000000000000000
 
-#define CSR_SATP 0x180
+
+/* supervisor CSR registers */
+#define CSR_SSTATUS	0x100
+#define CSR_SIE		0x104
+#define CSR_STVEC	0x105
+#define CSR_SCOUNTEREN	0x106
+
+#define CSR_SENVCFG	0x10A
+
+#define CSR_SSCRATCH	0x140
+#define CSR_SEPC	0x141
+#define CSR_SCAUSE	0x142
+#define CSR_STVAL	0x143
+#define CSR_SIP		0x144
+
+#define CSR_SATP	0x180
+
+#define CSR_SCONTEXT	0x5A8
+
+/* Exception causes */
+#define EXC_INST_MISALIGNED	0
+#define EXC_INST_ACCESS		1
+#define EXC_BREAKPOINT		3
+#define EXC_LOAD_ACCESS		5
+#define EXC_STORE_ACCESS	7
+#define EXC_SYSCALL		8
+#define EXC_INST_PAGE_FAULT	12
+#define EXC_LOAD_PAGE_FAULT	13
+#define EXC_STORE_PAGE_FAULT	15
 
 /* directly lifted from Linux:/arch/riscv/include/asm/asm.h:9-13 */
 #ifdef __ASSEMBLY__
diff --git a/arch/riscv/include/vmem.h b/arch/riscv/include/vmem.h
index d17aaf1..2cd3ac7 100644
--- a/arch/riscv/include/vmem.h
+++ b/arch/riscv/include/vmem.h
@@ -3,6 +3,7 @@
 
 #include <apos/types.h>
 #include <apos/attrs.h>
+#include <apos/pmem.h>
 
 #define VM_V (1 << 0)
 #define VM_R (1 << 1)
@@ -24,4 +25,11 @@ struct __packed vm_branch_t {
 	struct vm_branch_t *leaf[512];
 };
 
+
+void map_vmem(struct vm_branch_t *b,
+		pm_t paddr, vm_t vaddr, uint8_t flags, enum mm_order_t order);
+
+void unmap_vmem(struct vm_branch_t *b,
+		vm_t vaddr, enum mm_order_t order);
+
 #endif /* APOS_RISCV_VMAP_H */
-- 
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