soc: esp32c6: Improve shared memory

Improve shared memory usage among HP and LP Core

Signed-off-by: Lucas Tamborrino <lucas.tamborrino@espressif.com>

Author: LucasTambor

soc/espressif/esp32c6/default_lpcore.ld

@@ -24,9 +24,9 @@ _aligned_coproc_mem = ALIGNED_COPROC_MEM;
 _vector_table_org = LPSRAM_IRAM_START;
 _vector_table_len = 0x80;
 _ram_org = _vector_table_org + _vector_table_len;
-_ram_len = _aligned_coproc_mem - _vector_table_len - ULP_SHARED_MEM;
-_shared_mem_org = _ram_org + _ram_len;
-_shared_mem_len = ULP_SHARED_MEM;
+_ram_len = _aligned_coproc_mem - _vector_table_len - ULP_SHARED_MEM_SIZE;
+_shared_mem_org = ULP_SHARED_MEM_ADDR;
+_shared_mem_len = ULP_SHARED_MEM_SIZE;
 
 ENTRY(reset_vector)
 

soc/espressif/esp32c6/hpcore_init_ulp.c

@@ -10,13 +10,15 @@
 #include "ulp_lp_core.h"
 #include "lp_core_uart.h"
 #include <zephyr/logging/log.h>
+#include <zephyr/devicetree.h>
 
 LOG_MODULE_REGISTER(soc, CONFIG_SOC_LOG_LEVEL);
 
 void IRAM_ATTR lp_core_image_init(void)
 {
 	const uint32_t lpcore_img_off = FIXED_PARTITION_OFFSET(slot0_lpcore_partition);
-	const uint32_t lpcore_img_size = 0x4000;
+	const uint32_t lpcore_img_size =
+		DT_REG_SIZE(DT_NODELABEL(sramlp)) - DT_REG_SIZE(DT_NODELABEL(shmlp));
 	int ret = 0;
 
 	LOG_INF("Getting LPU image at %p, size %d", (void *)lpcore_img_off, lpcore_img_size);

soc/espressif/esp32c6/memory.h

@@ -7,7 +7,8 @@
 /* LP-SRAM (16kB) memory */
 #define LPSRAM_IRAM_START      DT_REG_ADDR(DT_NODELABEL(sramlp))
 #define LPSRAM_SIZE            DT_REG_SIZE(DT_NODELABEL(sramlp))
-#define ULP_SHARED_MEM         DT_REG_SIZE(DT_NODELABEL(shmlp))
+#define ULP_SHARED_MEM_SIZE    DT_REG_SIZE(DT_NODELABEL(shmlp))
+#define ULP_SHARED_MEM_ADDR    DT_REG_ADDR(DT_NODELABEL(shmlp))
 #define ULP_COPROC_RESERVE_MEM (0x4000)
 
 /* HP-SRAM (512kB) memory */