From 76517486919657ecadda9867125dc6730f29a5b7 Mon Sep 17 00:00:00 2001 From: Kimplul Date: Sat, 6 Jul 2024 18:14:04 +0300 Subject: pretty massive virtual memory rewrite + The system is now a bit simpler and hopefully easier to understand, while also extending the shared memory to be 1:N, where there is one owner who may become a zombie while waiting for the N to die. --- arch/riscv64/include/uapi.h | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 arch/riscv64/include/uapi.h (limited to 'arch/riscv64/include/uapi.h') diff --git a/arch/riscv64/include/uapi.h b/arch/riscv64/include/uapi.h new file mode 100644 index 0000000..a8c236b --- /dev/null +++ b/arch/riscv64/include/uapi.h @@ -0,0 +1,38 @@ +/* SPDX-License-Identifier: copyleft-next-0.3.1 */ +/* Copyright 2024, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */ + +#ifndef KMI_RISCV_UAPI_H +#define KMI_RISCV_UAPI_H + +/** + * @file uapi.h + * + * RISCV-specific stuff that should be visible to userspace, currently mainly + * VM_R/VM_W/VM_X flags. + */ + +/** Page is active. */ +#define VM_V (1 << 0) + +/** Page is readable. */ +#define VM_R (1 << 1) + +/** Page is writable. */ +#define VM_W (1 << 2) + +/** Page is executable. */ +#define VM_X (1 << 3) + +/** Page is user-accessible. */ +#define VM_U (1 << 4) + +/** Page is global. */ +#define VM_G (1 << 5) + +/** Page has been accessed. */ +#define VM_A (1 << 6) + +/** Page is dirty. */ +#define VM_D (1 << 7) + +#endif /* KMI_RISCV_UAPI_H */ -- cgit v1.3