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pmm, regions: separate memory regions related code from PMM
Add regions.{c,h} files to keep memory regions handling code separated
from PMM functionality. This allows to maintain code better and
isolate PMM from multiboot dependency.
Signed-off-by: Pawel Wieczorkiewicz <[email protected]>- Loading branch information
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,126 @@ | ||
| /* | ||
| * Copyright © 2021 Amazon.com, Inc. or its affiliates. | ||
| * 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. | ||
| * | ||
| * 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 KTF_REGIONS_H | ||
| #define KTF_REGIONS_H | ||
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| #define BDA_ADDR_START 0x400 | ||
| #define BDA_ADDR_END 0x4FF | ||
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| #define BDA_COM_PORTS_ENTRY 0x400 | ||
| #define EBDA_ADDR_ENTRY 0x40E | ||
|
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| #define BIOS_ACPI_ROM_START 0xE0000 | ||
| #define BIOS_ACPI_ROM_STOP 0xFFFFF | ||
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| #define BIOS_ROM_ADDR_START 0xF0000 | ||
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| #ifndef __ASSEMBLY__ | ||
| #include <cmdline.h> | ||
| #include <page.h> | ||
| #include <string.h> | ||
|
|
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| extern unsigned long __start_text[], __end_text[]; | ||
| extern unsigned long __start_data[], __end_data[]; | ||
| extern unsigned long __start_bss[], __end_bss[]; | ||
| extern unsigned long __start_rodata[], __end_rodata[]; | ||
|
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| extern unsigned long __start_text_user[], __end_text_user[]; | ||
| extern unsigned long __start_data_user[], __end_data_user[]; | ||
| extern unsigned long __start_bss_user[], __end_bss_user[]; | ||
|
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| extern unsigned long __start_text_init[], __end_text_init[]; | ||
| extern unsigned long __start_data_init[], __end_data_init[]; | ||
| extern unsigned long __start_bss_init[], __end_bss_init[]; | ||
|
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| extern unsigned long __start_text_rmode[], __end_text_rmode[]; | ||
| extern unsigned long __start_data_rmode[], __end_data_rmode[]; | ||
| extern unsigned long __start_bss_rmode[], __end_bss_rmode[]; | ||
|
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| extern struct ktf_param __start_cmdline[], __end_cmdline[]; | ||
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| extern unsigned long __weak __start_symbols[], __end_symbols[]; | ||
|
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| struct addr_range { | ||
| const char *name; | ||
| unsigned long base; | ||
| unsigned long flags; | ||
| void *start; | ||
| void *end; | ||
| }; | ||
| typedef struct addr_range addr_range_t; | ||
|
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| extern addr_range_t addr_ranges[]; | ||
| #define for_each_memory_range(ptr) \ | ||
| for (addr_range_t *ptr = &addr_ranges[0]; \ | ||
| ptr->name != NULL || (ptr->start != 0x0 && ptr->end != 0x0); ptr++) | ||
|
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| extern unsigned regions_num; | ||
|
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| /* External definitions */ | ||
|
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| extern void display_memory_map(void); | ||
|
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| extern addr_range_t get_memory_range(paddr_t pa); | ||
| extern paddr_t get_memory_range_start(paddr_t pa); | ||
| extern paddr_t get_memory_range_end(paddr_t pa); | ||
|
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| extern int get_avail_memory_range(unsigned index, addr_range_t *r); | ||
| extern bool has_memory_range(paddr_t pa); | ||
|
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| extern void init_regions(void); | ||
|
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| /* Static definitions */ | ||
|
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| static inline bool in_text_section(const void *addr) { | ||
| return (addr >= _ptr(__start_text) && addr < _ptr(__end_text)) || | ||
| (addr >= _ptr(__start_text_init) && addr < _ptr(__end_text_init)); | ||
| } | ||
|
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| static inline bool in_init_section(const void *addr) { | ||
| return (addr >= _ptr(__start_text_init) && addr < _ptr(__end_text_init)) || | ||
| (addr >= _ptr(__start_data_init) && addr < _ptr(__end_data_init)) || | ||
| (addr >= _ptr(__start_bss_init) && addr < _ptr(__end_bss_init)); | ||
| } | ||
|
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| static inline bool in_user_section(const void *addr) { | ||
| return (addr >= _ptr(__start_text_user) && addr < _ptr(__end_text_user)) || | ||
| (addr >= _ptr(__start_data_user) && addr < _ptr(__end_data_user)) || | ||
| (addr >= _ptr(__start_bss_user) && addr < _ptr(__end_bss_user)); | ||
| } | ||
|
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| static inline bool in_kernel_section(const void *addr) { | ||
| return (addr >= _ptr(__start_text) && addr < _ptr(__end_text)) || | ||
| (addr >= _ptr(__start_data) && addr < _ptr(__end_data)) || | ||
| (addr >= _ptr(__start_bss) && addr < _ptr(__end_bss)) || | ||
| (addr >= _ptr(__start_rodata) && addr < _ptr(__end_rodata)); | ||
| } | ||
|
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| static inline uint32_t get_bios_ebda_addr(void) { | ||
| return (*(uint16_t *) paddr_to_virt_kern(EBDA_ADDR_ENTRY)) << 4; | ||
| } | ||
|
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| #endif /* __ASSEMBLY__ */ | ||
|
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| #endif /* KTF_REGIONS_H */ |
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