From bc600ecc3bdf0f189861dfb840f70c2339a7a853 Mon Sep 17 00:00:00 2001 From: Kimplul Date: Fri, 24 May 2024 13:24:27 +0300 Subject: rename common to src + I keep starting to type src and wondering why autocomplete won't work, I guess src is just uncounciously a better name --- common/dmem.c | 154 ---------------------------------------------------------- 1 file changed, 154 deletions(-) delete mode 100644 common/dmem.c (limited to 'common/dmem.c') diff --git a/common/dmem.c b/common/dmem.c deleted file mode 100644 index bbabe09..0000000 --- a/common/dmem.c +++ /dev/null @@ -1,154 +0,0 @@ -/* SPDX-License-Identifier: copyleft-next-0.3.1 */ -/* Copyright 2021 - 2022, Kim Kuparinen < kimi.h.kuparinen@gmail.com > */ - -/** - * @file dmem.c - * Handle device memory, i.e. anything outside the physical RAM. - * - * \todo Handle NUMA. - */ - -#include -#include - -/** Region before RAM. */ -static struct mem_region_root pre_ram = { 0 }; - -/** Region after RAM. */ -static struct mem_region_root post_ram = { 0 }; - -pm_t __pre_base = 0; -pm_t __pre_top = 0; -pm_t __post_base = 0; -pm_t __post_top = 0; - -stat_t init_devmem(pm_t ram_base, pm_t ram_top) -{ - pm_t mem_top = (pm_t)-1; - - __pre_base = 0; - __pre_top = ram_base - 1; - - __post_base = ram_top; - __post_top = mem_top; - - size_t pre_pages = __pages(__pre_top); - size_t post_pages = __pages(__post_top) - __pages(__post_base); - - init_region(&pre_ram, __pre_base, pre_pages); - init_region(&post_ram, __post_base, post_pages); - - return OK; -} - -/** - * Device virtual memory worker callback for \ref map_fill_region(). - * - * @param b Virtual memory to work in. - * @param offset Hint for \ref alloc_page(). - * @param vaddr Current virtual address. - * @param flags Flags of region. - * @param order Suggested page order. - * @param data Pointer to \ref stat_t. - * @return \see alloc_uvmem_wrapper(). - * - * \see alloc_uvmem_wrapper(). - */ -static stat_t dev_alloc_wrapper(struct vmem *b, pm_t *offset, vm_t vaddr, - vmflags_t flags, enum mm_order order, - void *data) -{ - stat_t *status = (stat_t *)data; - /** \todo remember to do something with this status info */ - *status = map_vpage(b, *offset, vaddr, flags, order); - *offset += order_size(order); - return OK; -} - -/** - * Device virtual memory freeing worker callback for \ref map_fill_region(). - * - * @param b Virtual memory to work in. - * @param offset Hint for \ref alloc_page(). - * @param vaddr Current virtual address. - * @param flags Flags of region. - * @param order Suggested page order. - * @param data Pointer to \ref stat_t. - * @return \see alloc_uvmem_wrapper(). - * - * \see alloc_uvmem_wrapper(). - */ -static stat_t dev_free_wrapper(struct vmem *b, pm_t *offset, vm_t vaddr, - vmflags_t flags, enum mm_order order, void *data) -{ - UNUSED(offset); - UNUSED(flags); - pm_t paddr = 0; - enum mm_order v_order = 0; - stat_vpage(b, vaddr, &paddr, &v_order, 0); - if (order != v_order) - return INFO_TRGN; - - stat_t *status = (stat_t *)data; - *status = unmap_vpage(b, vaddr); - return OK; -} - -vm_t alloc_devmem(struct tcb *t, pm_t dev_start, size_t bytes, vmflags_t flags) -{ - hard_assert(t && is_proc(t), ERR_INVAL); - - vm_t region = 0; - if (dev_start < __pre_top) - region = alloc_region(&pre_ram, bytes, 0, flags); - - if (dev_start > __post_base) - region = alloc_region(&post_ram, bytes, 0, flags); - - if (!region) - return NULL; - - stat_t status = OK; - const vm_t w = map_fill_region(t->proc.vmem, &dev_alloc_wrapper, - dev_start, region, - bytes, flags, &status); - - if (status) - return NULL; - - return w; -} - -stat_t free_devmem(struct tcb *t, vm_t dev_start) -{ - hard_assert(t && is_proc(t), ERR_INVAL); - - pm_t dev_paddr = 0; - stat_vpage(t->proc.vmem, dev_start, &dev_paddr, 0, 0); - - if (dev_paddr >= __pre_top && dev_paddr <= __post_base) - return ERR_ADDR; - - struct mem_region *m = 0; - if (dev_paddr < __pre_top) - m = find_used_region(&pre_ram, dev_paddr); - - if (dev_paddr > __post_base) - m = find_used_region(&post_ram, dev_paddr); - - if (!m) - return ERR_NF; - - size_t region_size = __addr(m->end - m->start); - stat_t status = OK; - map_fill_region(t->proc.vmem, &dev_free_wrapper, dev_paddr, dev_start, - region_size, 0, &status); - - if (dev_paddr < __pre_top) - free_region(&pre_ram, dev_paddr); - - if (dev_paddr > __post_base) - free_region(&post_ram, dev_paddr); - - return status; -} -- cgit v1.3