diff options
Diffstat (limited to 'arch/riscv/include/asm/csr.h')
| -rw-r--r-- | arch/riscv/include/asm/csr.h | 37 |
1 files changed, 0 insertions, 37 deletions
diff --git a/arch/riscv/include/asm/csr.h b/arch/riscv/include/asm/csr.h deleted file mode 100644 index 42f1eb4..0000000 --- a/arch/riscv/include/asm/csr.h +++ /dev/null @@ -1,37 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-or-later */ -/* Copyright (C) 2026 Richard Qin */ - -#ifndef _ASM_RISCV_CSR_H -#define _ASM_RISCV_CSR_H - -/* - * RISC-V CSR (Control & Status Register) definitions used by the early - * boot / MMU-switch path. - * - * LumeOS-native subset of Linux arch/riscv/include/asm/csr.h. Only the - * symbols head.S and mm/init.cc actually reference are defined — adding - * the rest is straightforward when new code needs them, and skipping the - * Linux ALTERNATIVE / vendor-extension machinery keeps the cascade flat. - */ - -/* SATP (Supervisor Address Translation and Protection) layout — RV64 */ -#define SATP_PPN_MASK 0x00000FFFFFFFFFFFUL /* bits [43:0] = root PPN */ -#define SATP_ASID_SHIFT 44 -#define SATP_MODE_SHIFT 60 - -/* SATP MODE encodings (RV64) */ -#define SATP_MODE_BARE (0UL << SATP_MODE_SHIFT) -#define SATP_MODE_SV39 (8UL << SATP_MODE_SHIFT) -#define SATP_MODE_SV48 (9UL << SATP_MODE_SHIFT) - -/* Compose a SATP value from a page-table physical address. - * Result: MODE | (root_ppn) where root_ppn = pgd_pa >> PAGE_SHIFT. */ -#define MAKE_SATP(mode, pgd_pa) ((mode) | (((pgd_pa) >> 12) & SATP_PPN_MASK)) - -/* SSTATUS bits we touch at boot — disable FP / vector at entry so that an - * accidental FP / V instruction in early code traps cleanly rather than - * silently using dirty state from before reset. */ -#define SR_FS_OFF (0UL << 13) -#define SR_VS_OFF (0UL << 9) - -#endif /* _ASM_RISCV_CSR_H */ |