| nabkah01 | 002e569 | 2022-10-10 12:36:46 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2022, Arm Limited. All rights reserved. |
| 3 | * |
| 4 | * SPDX-License-Identifier: BSD-3-Clause |
| 5 | * |
| 6 | */ |
| 7 | |
| 8 | #include <stdbool.h> |
| 9 | #include <stdint.h> |
| 10 | |
| 11 | #include <debug.h> |
| 12 | #include <heap/page_alloc.h> |
| 13 | #include <spinlock.h> |
| 14 | #include <utils_def.h> |
| 15 | |
| 16 | #include <platform_def.h> |
| 17 | |
| 18 | static uint64_t memory_used; |
| 19 | static uint64_t heap_base_addr; |
| 20 | static u_register_t heap_addr; |
| 21 | static uint64_t heap_size; |
| 22 | static bool heap_initialised = HEAP_INIT_FAILED; |
| 23 | static spinlock_t mem_lock; |
| 24 | |
| 25 | /* |
| 26 | * Initialize the memory heap space to be used |
| 27 | * @heap_base: heap base address |
| 28 | * @heap_len: heap size for use |
| 29 | */ |
| 30 | int page_pool_init(uint64_t heap_base, uint64_t heap_len) |
| 31 | { |
| 32 | const uint64_t plat_max_addr = (uint64_t)DRAM_BASE + (uint64_t)DRAM_SIZE; |
| 33 | uint64_t max_addr = heap_base + heap_len; |
| 34 | |
| 35 | if (heap_len == 0ULL) { |
| 36 | ERROR("heap_len must be non-zero value\n"); |
| 37 | heap_initialised = HEAP_INVALID_LEN; |
| 38 | } else if (max_addr >= plat_max_addr) { |
| 39 | ERROR("heap_base + heap[0x%llx] must not exceed platform" |
| 40 | "max address[0x%llx]\n", max_addr, plat_max_addr); |
| 41 | |
| 42 | heap_initialised = HEAP_OUT_OF_RANGE; |
| 43 | } else { |
| 44 | heap_base_addr = heap_base; |
| 45 | memory_used = heap_base; |
| 46 | heap_size = heap_len; |
| 47 | heap_initialised = HEAP_INIT_SUCCESS; |
| 48 | } |
| 49 | return heap_initialised; |
| 50 | } |
| 51 | |
| 52 | /* |
| 53 | * Return the pointer to the allocated pages |
| 54 | * @bytes_size: pages to allocate in byte unit |
| 55 | */ |
| 56 | void *page_alloc(u_register_t bytes_size) |
| 57 | { |
| 58 | if (heap_initialised != HEAP_INIT_SUCCESS) { |
| 59 | ERROR("heap need to be initialised first\n"); |
| 60 | return HEAP_NULL_PTR; |
| 61 | } |
| 62 | if (bytes_size == 0UL) { |
| 63 | ERROR("bytes_size must be non-zero value\n"); |
| 64 | return HEAP_NULL_PTR; |
| 65 | } |
| 66 | |
| 67 | spin_lock(&mem_lock); |
| 68 | |
| 69 | if ((memory_used + bytes_size) >= (heap_base_addr + heap_size)) { |
| 70 | ERROR("Reached to max KB allowed[%llu]\n", (heap_size/1024U)); |
| 71 | goto unlock_failed; |
| 72 | } |
| 73 | /* set pointer to current used heap memory cursor */ |
| 74 | heap_addr = memory_used; |
| 75 | /* move used memory cursor by bytes_size */ |
| 76 | memory_used += bytes_size; |
| 77 | spin_unlock(&mem_lock); |
| 78 | |
| 79 | return (void *)heap_addr; |
| 80 | |
| 81 | unlock_failed:/* failed allocation */ |
| 82 | spin_unlock(&mem_lock); |
| 83 | return HEAP_NULL_PTR; |
| 84 | } |
| 85 | |
| 86 | /* |
| 87 | * Reset heap memory usage cursor to heap base address |
| 88 | */ |
| 89 | void page_pool_reset(void) |
| 90 | { |
| 91 | /* |
| 92 | * No race condition here, only lead cpu running TFTF test case can |
| 93 | * reset the memory allocation |
| 94 | */ |
| 95 | memory_used = heap_base_addr; |
| 96 | } |
| 97 | |
| 98 | void page_free(u_register_t address) |
| 99 | { |
| 100 | /* No memory free is needed in current TFTF test scenarios */ |
| 101 | } |