From 5ed7a0707f13662384ef77bec3faaaffdfd36772 Mon Sep 17 00:00:00 2001 From: Ian Moffett Date: Sun, 16 Nov 2025 14:34:14 -0500 Subject: kern/amd64+mu: Add initial virtual memory sources Signed-off-by: Ian Moffett --- sys/inc/arch/amd64/vas.h | 39 ++++++++++++++++++++++++++++++++++ sys/inc/mu/mmu.h | 54 ++++++++++++++++++++++++++++++++++++++++++++++++ sys/inc/vm/vm.h | 6 ++++++ 3 files changed, 99 insertions(+) create mode 100644 sys/inc/arch/amd64/vas.h create mode 100644 sys/inc/mu/mmu.h (limited to 'sys/inc') diff --git a/sys/inc/arch/amd64/vas.h b/sys/inc/arch/amd64/vas.h new file mode 100644 index 0000000..eeca5f7 --- /dev/null +++ b/sys/inc/arch/amd64/vas.h @@ -0,0 +1,39 @@ +/* + * Copyright (c) 2023-2025 Ian Marco Moffett and the Osmora Team. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of Hyra nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef _MACHINE_VAS_H_ +#define _MACHINE_VAS_H_ 1 + +#include + +struct mmu_vas { + uintptr_t cr3; +}; + +#endif /* !_MACHINE_VAS_H_ */ diff --git a/sys/inc/mu/mmu.h b/sys/inc/mu/mmu.h new file mode 100644 index 0000000..85f4343 --- /dev/null +++ b/sys/inc/mu/mmu.h @@ -0,0 +1,54 @@ +/* + * Copyright (c) 2023-2025 Ian Marco Moffett and the Osmora Team. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of Hyra nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef _MU_PMAP_H_ +#define _MU_PMAP_H_ 1 + +#include +#include +#include /* shared */ + +/* + * Read the currently in-use virtual address space + * structure + */ +__weak int mu_pmap_readvas(struct mmu_vas *vas); + +/* + * Write a new virtual address structure to be put + * into use as the current address space + */ +__weak int mu_pmap_writevas(struct mmu_vas *vas); + +/* + * Initialize the platform memory management unit + */ +__weak void mu_pmap_init(void); + +#endif /* !_MU_PMAP_H_ */ diff --git a/sys/inc/vm/vm.h b/sys/inc/vm/vm.h index e1866cb..4134005 100644 --- a/sys/inc/vm/vm.h +++ b/sys/inc/vm/vm.h @@ -40,4 +40,10 @@ extern volatile struct limine_hhdm_request hhdm_req; #define PHYS_TO_VIRT(PHYS) PTR_OFFSET(PHYS, hhdm_req.response->offset) #define VIRT_TO_PHYS(VIRT) (uintptr_t)PTR_NOFFET(VIRT, hhdm_req.response->offset) +/* + * Initialize the virtual memory management + * subsystem + */ +void vm_init(void); + #endif /* !_VM_VM_H_ */ -- cgit v1.2.3