michaelh/zephyr
1
0
Fork 0
Code Releases Activity

soc: xtensa: esp32s3: add support for SPIRAM

Browse source 
Add support for external PSRAM for esp32s3.

Signed-off-by: Lucas Tamborrino <lucas.tamborrino@espressif.com>
This commit is contained in:
Lucas Tamborrino 2023-05-29 09:20:49 -03:00 • committed by Carles Cufí
commit c435dea191
4 changed files with 91 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

29
soc/xtensa/espressif_esp32/esp32s3/default.ld
View file

@ -39,6 +39,8 @@
#define RAMABLE_REGION dram0_0_seg
#define ROMABLE_REGION ROM
#define EXT_RAM_ORG (0x3E000000 - CONFIG_ESP_SPIRAM_SIZE)
#ifdef CONFIG_FLASH_SIZE
#define FLASH_SIZE CONFIG_FLASH_SIZE
#else
@ -70,7 +72,13 @@ MEMORY
* Hence, an offset of 0x40 is added to DROM segment origin.
*/
drom0_0_seg(R): org = 0x3C000040, len = FLASH_SIZE - 0x40
/**
* `extern_ram_seg` and `drom0_0_seg` share the same bus and the address region.
* so we allocate `extern_ram_seg` at the end of the address region.
*/
#if defined(CONFIG_ESP_SPIRAM)
ext_ram_seg(RWX): org = EXT_RAM_ORG, len = CONFIG_ESP_SPIRAM_SIZE
#endif
/* RTC fast memory (executable). Persists over deep sleep.
*/
rtc_iram_seg(RWX): org = 0x600fe000, len = 0x2000
@ -219,6 +227,17 @@ SECTIONS
_image_rodata_end = ABSOLUTE(.);
} GROUP_DATA_LINK_IN(RODATA_REGION, ROMABLE_REGION)
#if defined(CONFIG_ESP_SPIRAM)
/* This section holds .ext_ram.bss data, and will be put in PSRAM */
.ext_ram.bss (NOLOAD) :
{
_ext_ram_bss_start = ABSOLUTE(.);
*(.ext_ram.bss*)
. = ALIGN(4);
_ext_ram_bss_end = ABSOLUTE(.);
} > ext_ram_seg
#endif
/* Send .iram0 code to iram */
.iram0.vectors : ALIGN(4)
{
@ -272,6 +291,9 @@ SECTIONS
*libsoc.a:rtc_*.*(.literal .text .literal.* .text.*)
*libsoc.a:cpu_util.*(.literal .text .literal.* .text.*)
*libgcc.a:lib2funcs.*(.literal .text .literal.* .text.*)
*libzephyr.a:spiram*.*(.literal .text .literal.* .text.*)
*libzephyr.a:spi_timing*.*(.literal .text .literal.* .text.*)
*libzephyr.a:spi_flash*.*(.literal .text .literal.* .text.*)
*libdrivers__flash.a:flash_esp32.*(.literal .text .literal.* .text.*)
*libzephyr.a:windowspill_asm.*(.literal .text .literal.* .text.*)
*libzephyr.a:log_noos.*(.literal .text .literal.* .text.*)
@ -642,3 +664,8 @@ SECTIONS
ASSERT(((_iram_end - ORIGIN(iram0_0_seg)) <= LENGTH(iram0_0_seg)),
"IRAM0 segment data does not fit.")
#if defined(CONFIG_ESP_SPIRAM)
ASSERT(((ORIGIN(ext_ram_seg)) > _image_rodata_end),
"External RAM segment does not fit.")
#endif