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bsp/tms570: Initialize SRAM on demand

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Update #4982.
This commit is contained in:
Sebastian Huber
2023-12-21 15:16:48 +01:00
parent 23ba8d2c2c
commit 2db0844b87
1 changed files with 27 additions and 10 deletions
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37
bsps/arm/tms570/start/bspstarthooks-hwinit.c
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@@ -9,6 +9,7 @@
*/
/*
* Copyright (C) 2023 embedded brains GmbH & Co. KG
* Copyright (C) 2016 Pavel Pisa <pisa@cmp.felk.cvut.cz>
*
* Czech Technical University in Prague
@@ -50,7 +51,32 @@
#define PBIST_March13N_SP 0x00000008U /**< March13 N Algo for 1 Port mem */
BSP_START_TEXT_SECTION void bsp_start_hook_0( void )
/* Use assembly code to avoid using the stack */
__attribute__((__naked__)) void bsp_start_hook_0( void )
{
__asm__ volatile (
/* Check if we run in SRAM */
"ldr r0, =#" RTEMS_XSTRING( TMS570_MEMORY_SRAM_ORIGIN ) "\n"
"ldr r1, =#" RTEMS_XSTRING( TMS570_MEMORY_SRAM_SIZE ) "\n"
"sub r0, lr, r0\n"
"cmp r1, r0\n"
"blt 1f\n"
/*
* Initialize the SRAM if we are not running in SRAM. While we are called,
* non-volatile register r7 is not used by start.S.
*/
"movs r0, #0x1\n"
"mov r7, lr\n"
"bl tms570_memory_init\n"
"mov lr, r7\n"
/* Jump to the high level start hook */
"1: b tms570_start_hook_0\n"
);
}
static RTEMS_USED void tms570_start_hook_0( void )
{
#if TMS570_VARIANT == 3137
/*
@@ -170,15 +196,6 @@ BSP_START_TEXT_SECTION void bsp_start_hook_0( void )
tms570_pbist_run_and_check( 0x08300020U, /* ESRAM Single Port PBIST */
(uint32_t) PBIST_March13N_SP );
/*
* Initialize CPU RAM.
* This function uses the system module's hardware for auto-initialization of memories and their
* associated protection schemes. The CPU RAM is initialized by setting bit 0 of the MSIENA register.
* Hence the value 0x1 passed to the function.
* This function will initialize the entire CPU RAM and the corresponding ECC locations.
*/
tms570_memory_init( 0x1U );
/*
* Enable ECC checking for TCRAM accesses.
* This function enables the CPU's ECC logic for accesses to B0TCM and B1TCM.