diff options
| -rw-r--r-- | Makefile | 1 | ||||
| -rwxr-xr-x | freebsd-to-rtems.py | 1 | ||||
| -rw-r--r-- | rtemsbsd/include/machine/rtems-bsd-page.h | 92 | ||||
| -rw-r--r-- | rtemsbsd/rtems/rtems-bsd-page.c | 149 |
4 files changed, 243 insertions, 0 deletions
@@ -83,6 +83,7 @@ LIB_C_FILES += rtemsbsd/rtems/rtems-bsd-mutex.c LIB_C_FILES += rtemsbsd/rtems/rtems-bsd-muteximpl.c LIB_C_FILES += rtemsbsd/rtems/rtems-bsd-newproc.c LIB_C_FILES += rtemsbsd/rtems/rtems-bsd-nexus.c +LIB_C_FILES += rtemsbsd/rtems/rtems-bsd-page.c LIB_C_FILES += rtemsbsd/rtems/rtems-bsd-panic.c LIB_C_FILES += rtemsbsd/rtems/rtems-bsd-pci_bus.c LIB_C_FILES += rtemsbsd/rtems/rtems-bsd-pci_cfgreg.c diff --git a/freebsd-to-rtems.py b/freebsd-to-rtems.py index ab335223..439c4b17 100755 --- a/freebsd-to-rtems.py +++ b/freebsd-to-rtems.py @@ -681,6 +681,7 @@ rtems.addRTEMSSourceFiles( 'rtems/rtems-bsd-muteximpl.c', 'rtems/rtems-bsd-newproc.c', 'rtems/rtems-bsd-nexus.c', + 'rtems/rtems-bsd-page.c', 'rtems/rtems-bsd-panic.c', 'rtems/rtems-bsd-pci_bus.c', 'rtems/rtems-bsd-pci_cfgreg.c', diff --git a/rtemsbsd/include/machine/rtems-bsd-page.h b/rtemsbsd/include/machine/rtems-bsd-page.h new file mode 100644 index 00000000..b732c1a9 --- /dev/null +++ b/rtemsbsd/include/machine/rtems-bsd-page.h @@ -0,0 +1,92 @@ +/** + * @file + * + * @ingroup rtems_bsd_machine + * + * @brief TODO. + */ + +/* + * Copyright (c) 2015 embedded brains GmbH. All rights reserved. + * + * embedded brains GmbH + * Dornierstr. 4 + * 82178 Puchheim + * Germany + * <rtems@embedded-brains.de> + * + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 _RTEMS_BSD_MACHINE_RTEMS_BSD_PAGE_H_ +#define _RTEMS_BSD_MACHINE_RTEMS_BSD_PAGE_H_ + +/* + * A page is a fixed size memory area of size PAGE_SIZE with the ability to + * associate an object with it. The memory pool for pages has a fixed size and + * is allocated during system initialization. This API is intended to be used + * by ZONE(9). + */ + +#include <sys/cdefs.h> +#include <sys/param.h> +#include <stdint.h> + +__BEGIN_DECLS + +extern void **rtems_bsd_page_object_table; + +extern uintptr_t rtems_bsd_page_area_begin; + +void *rtems_bsd_page_alloc(uintptr_t size_in_bytes, int wait); + +void rtems_bsd_page_free(void *addr); + +static inline void ** +rtems_bsd_page_get_object_entry(void *addr) +{ + uintptr_t a = (uintptr_t)addr; + uintptr_t b = rtems_bsd_page_area_begin; + uintptr_t s = PAGE_SHIFT; + + return (&rtems_bsd_page_object_table[(a - b) >> s]); +} + +static inline void * +rtems_bsd_page_get_object(void *addr) +{ + void **obj_entry = rtems_bsd_page_get_object_entry(addr); + + return (*obj_entry); +} + +static inline void +rtems_bsd_page_set_object(void *addr, void *obj) +{ + void **obj_entry = rtems_bsd_page_get_object_entry(addr); + + *obj_entry = obj; +} + +__END_DECLS + +#endif /* _RTEMS_BSD_MACHINE_RTEMS_BSD_PAGE_H_ */ diff --git a/rtemsbsd/rtems/rtems-bsd-page.c b/rtemsbsd/rtems/rtems-bsd-page.c new file mode 100644 index 00000000..929d466d --- /dev/null +++ b/rtemsbsd/rtems/rtems-bsd-page.c @@ -0,0 +1,149 @@ +/** + * @file + * + * @ingroup rtems_bsd_rtems + * + * @brief TODO. + */ + +/* + * Copyright (c) 2015 embedded brains GmbH. All rights reserved. + * + * embedded brains GmbH + * Dornierstr. 4 + * 82178 Puchheim + * Germany + * <rtems@embedded-brains.de> + * + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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. + */ + +#include <machine/rtems-bsd-kernel-space.h> +#include <machine/rtems-bsd-page.h> + +#include <rtems/bsd/sys/param.h> +#include <rtems/bsd/sys/types.h> +#include <rtems/bsd/sys/lock.h> +#include <sys/mutex.h> +#include <sys/systm.h> +#include <sys/kernel.h> +#include <vm/uma.h> + +#include <stdlib.h> + +#include <rtems/malloc.h> +#include <rtems/rbheap.h> + +/* FIXME: This must be application configurable */ +#define PAGE_HEAP_SIZE (8 * 1024 * 1024) + +void **rtems_bsd_page_object_table; + +uintptr_t rtems_bsd_page_area_begin; + +static rtems_rbheap_control page_heap; + +struct mtx page_heap_mtx; + +void * +rtems_bsd_page_alloc(uintptr_t size_in_bytes, int wait) +{ + void *addr; + + mtx_lock(&page_heap_mtx); + + addr = rtems_rbheap_allocate(&page_heap, size_in_bytes); + if (addr == NULL && wait) { + int i; + + for (i = 0; i < 8; i++) { + mtx_unlock(&page_heap_mtx); + uma_reclaim(); + mtx_lock(&page_heap_mtx); + + addr = rtems_rbheap_allocate(&page_heap, size_in_bytes); + if (addr != NULL) + break; + + msleep(&page_heap, &page_heap_mtx, 0, + "page alloc", (hz / 4) * (i + 1)); + } + + if (i == 8) { + panic("rtems_bsd_page_alloc: page starvation"); + } + } + + mtx_unlock(&page_heap_mtx); + + return (addr); +} + +void +rtems_bsd_page_free(void *addr) +{ + mtx_lock(&page_heap_mtx); + rtems_rbheap_free(&page_heap, addr); + wakeup(&page_heap); + mtx_unlock(&page_heap_mtx); +} + +static void +rtems_bsd_page_init(void *arg) +{ + rtems_status_code sc; + void *area; + void **obj_table; + rtems_rbheap_chunk *chunks; + size_t i; + size_t n; + + mtx_init(&page_heap_mtx, "page heap", NULL, MTX_DEF); + + area = rtems_heap_allocate_aligned_with_boundary(PAGE_HEAP_SIZE, + PAGE_SIZE, 0); + BSD_ASSERT(area != NULL); + + sc = rtems_rbheap_initialize(&page_heap, area, PAGE_HEAP_SIZE, + PAGE_SIZE, rtems_rbheap_extend_descriptors_with_malloc, NULL); + BSD_ASSERT(sc == RTEMS_SUCCESSFUL); + + rtems_rbheap_set_extend_descriptors(&page_heap, + rtems_rbheap_extend_descriptors_never); + + n = PAGE_HEAP_SIZE / PAGE_SIZE; + + chunks = malloc(n * sizeof(*chunks), M_RTEMS_HEAP, M_NOWAIT); + BSD_ASSERT(chunks != NULL); + + for (i = 0; i < n; ++i) { + rtems_rbheap_add_to_spare_descriptor_chain(&page_heap, + &chunks[i]); + } + + obj_table = calloc(n, sizeof(*obj_table)); + + rtems_bsd_page_area_begin = (uintptr_t)area; + rtems_bsd_page_object_table = obj_table; +} + +SYSINIT(rtems_bsd_page, SI_SUB_VM, SI_ORDER_FIRST, rtems_bsd_page_init, NULL); |