4e092be6d6
We reserve 4KB Slow RTC memory to save RF calibation result and BT NVS data. If not all these Slow RTC momory Blocks are used, we will open the other parts.
55 lines
2.1 KiB
Text
55 lines
2.1 KiB
Text
/* ESP32 Linker Script Memory Layout
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This file describes the memory layout (memory blocks) as virtual
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memory addresses.
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esp32.common.ld contains output sections to link compiler output
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into these memory blocks.
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***
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This linker script is passed through the C preprocessor to include
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configuration options.
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Please use preprocessor features sparingly! Restrict
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to simple macros with numeric values, and/or #if/#endif blocks.
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*/
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#include "sdkconfig.h"
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MEMORY
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{
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/* All these values assume the flash cache is on, and have the blocks this uses subtracted from the length
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of the various regions. The 'data access port' dram/drom regions map to the same iram/irom regions but
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are connected to the data port of the CPU and eg allow bytewise access. */
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/* IRAM for PRO cpu. Not sure if happy with this, this is MMU area... */
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iram0_0_seg (RX) : org = 0x40080000, len = 0x20000
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/* Even though the segment name is iram, it is actually mapped to flash */
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iram0_2_seg (RX) : org = 0x400D0018, len = 0x330000
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/* Shared data RAM, excluding memory reserved for ROM bss/data/stack.
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Enabling Bluetooth & Trace Memory features in menuconfig will decrease
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the amount of RAM available.
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*/
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dram0_0_seg (RW) : org = 0x3FFB0000 + CONFIG_BT_RESERVE_DRAM,
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len = 0x50000 - CONFIG_TRACEMEM_RESERVE_DRAM - CONFIG_BT_RESERVE_DRAM
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/* Flash mapped constant data */
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drom0_0_seg (R) : org = 0x3F400010, len = 0x800000
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/* RTC fast memory (executable). Persists over deep sleep.
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*/
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rtc_iram_seg(RWX) : org = 0x400C0000, len = 0x2000
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/* RTC slow memory (data accessible). Persists over deep sleep.
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Start of RTC slow memory is reserved for ULP co-processor code + data, if enabled.
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*/
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rtc_slow_seg(RW) : org = 0x50000000 + CONFIG_ULP_COPROC_RESERVE_MEM,
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len = 0x1000 - CONFIG_ULP_COPROC_RESERVE_MEM
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}
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/* Heap ends at top of dram0_0_seg */
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_heap_end = 0x40000000 - CONFIG_TRACEMEM_RESERVE_DRAM;
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