Speedup SD card & enlarge your RAM. (#1649)

* FuriHal: sram2 memory manager
* FuriHal: sram2 memory allocator
* FuriHal: allow NULL buffers for txrx in spi hal
* SD card: sector cache
* FuriHal: fix init in memory hal
* RPC: STARTUP instead SERVICE
* Memory: pool "free" command
* Thread: service can be statically allocated in a memory pool

Co-authored-by: あく <alleteam@gmail.com>

firmware/targets/f7/furi_hal/furi_hal_memory.c

@@ -0,0 +1,119 @@
+#include <furi_hal.h>
+#include <furi_hal_memory.h>
+#include <furi_hal_rtc.h>
+
+#define TAG "FuriHalMemory"
+
+typedef enum {
+    SRAM_A,
+    SRAM_B,
+    SRAM_MAX,
+} SRAM;
+
+typedef struct {
+    void* start;
+    uint32_t size;
+} FuriHalMemoryRegion;
+
+typedef struct {
+    FuriHalMemoryRegion region[SRAM_MAX];
+} FuriHalMemory;
+
+static FuriHalMemory* furi_hal_memory = NULL;
+
+extern const void __sram2a_start__;
+extern const void __sram2a_free__;
+extern const void __sram2b_start__;
+
+void furi_hal_memory_init() {
+    if(furi_hal_rtc_get_boot_mode() != FuriHalRtcBootModeNormal) {
+        return;
+    }
+
+    if(!ble_glue_wait_for_c2_start(FURI_HAL_BT_C2_START_TIMEOUT)) {
+        FURI_LOG_E(TAG, "C2 start timeout");
+        return;
+    }
+
+    FuriHalMemory* memory = malloc(sizeof(FuriHalMemory));
+
+    const BleGlueC2Info* c2_ver = ble_glue_get_c2_info();
+
+    if(c2_ver->mode == BleGlueC2ModeStack) {
+        uint32_t sram2a_busy_size = (uint32_t)&__sram2a_free__ - (uint32_t)&__sram2a_start__;
+        uint32_t sram2a_unprotected_size = (32 - c2_ver->MemorySizeSram2A) * 1024;
+        uint32_t sram2b_unprotected_size = (32 - c2_ver->MemorySizeSram2B) * 1024;
+
+        memory->region[SRAM_A].start = (uint8_t*)&__sram2a_free__;
+        memory->region[SRAM_B].start = (uint8_t*)&__sram2b_start__;
+
+        if(sram2a_unprotected_size > sram2a_busy_size) {
+            memory->region[SRAM_A].size = sram2a_unprotected_size - sram2a_busy_size;
+        } else {
+            memory->region[SRAM_A].size = 0;
+        }
+        memory->region[SRAM_B].size = sram2b_unprotected_size;
+
+        FURI_LOG_I(
+            TAG, "SRAM2A: 0x%p, %d", memory->region[SRAM_A].start, memory->region[SRAM_A].size);
+        FURI_LOG_I(
+            TAG, "SRAM2B: 0x%p, %d", memory->region[SRAM_B].start, memory->region[SRAM_B].size);
+
+        if((memory->region[SRAM_A].size > 0) || (memory->region[SRAM_B].size > 0)) {
+            if((memory->region[SRAM_A].size > 0)) {
+                FURI_LOG_I(TAG, "SRAM2A clear");
+                memset(memory->region[SRAM_A].start, 0, memory->region[SRAM_A].size);
+            }
+            if((memory->region[SRAM_B].size > 0)) {
+                FURI_LOG_I(TAG, "SRAM2B clear");
+                memset(memory->region[SRAM_B].start, 0, memory->region[SRAM_B].size);
+            }
+            furi_hal_memory = memory;
+            FURI_LOG_I(TAG, "Enabled");
+        } else {
+            free(memory);
+            FURI_LOG_E(TAG, "No SRAM2 available");
+        }
+    } else {
+        free(memory);
+        FURI_LOG_E(TAG, "No Core2 available");
+    }
+}
+
+void* furi_hal_memory_alloc(size_t size) {
+    if(furi_hal_memory == NULL) {
+        return NULL;
+    }
+
+    for(int i = 0; i < SRAM_MAX; i++) {
+        if(furi_hal_memory->region[i].size >= size) {
+            void* ptr = furi_hal_memory->region[i].start;
+            furi_hal_memory->region[i].start += size;
+            furi_hal_memory->region[i].size -= size;
+            return ptr;
+        }
+    }
+    return NULL;
+}
+
+size_t furi_hal_memory_get_free() {
+    if(furi_hal_memory == NULL) return 0;
+
+    size_t free = 0;
+    for(int i = 0; i < SRAM_MAX; i++) {
+        free += furi_hal_memory->region[i].size;
+    }
+    return free;
+}
+
+size_t furi_hal_memory_max_pool_block() {
+    if(furi_hal_memory == NULL) return 0;
+
+    size_t max = 0;
+    for(int i = 0; i < SRAM_MAX; i++) {
+        if(furi_hal_memory->region[i].size > max) {
+            max = furi_hal_memory->region[i].size;
+        }
+    }
+    return max;
+}