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mpfs_entrypoints.c: Open all memory from PMP for hart before booting

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Open PMP before the hart payload starts to execute
This commit is contained in:
Ville Juven 2023-10-17 15:33:51 +03:00 committed by Alan Carvalho de Assis
parent 17a7a7bd76
commit 598e1c6512
1 changed files with 14 additions and 0 deletions
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14
arch/risc-v/src/mpfs/mpfs_entrypoints.c
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@ -33,6 +33,8 @@
#include <sys/types.h>
#include "riscv_internal.h"
/****************************************************************************
* Extern Function Declarations
****************************************************************************/
@ -45,6 +47,10 @@ extern void mpfs_opensbi_prepare_hart(void);
#define ENTRYPT_CNT sizeof(g_app_entrypoints) / sizeof(g_app_entrypoints[0])
/* Default PMP permissions */
#define PMP_DEFAULT_PERM (PMPCFG_A_NAPOT | PMPCFG_R | PMPCFG_W | PMPCFG_X)
/****************************************************************************
* Private Data
****************************************************************************/
@ -88,6 +94,11 @@ void mpfs_jump_to_app(void)
__asm__ __volatile__
(
"csrr a0, mhartid\n" /* Hart ID */
"li t0, -1\n" /* Open the whole SoC */
"csrw pmpaddr0, t0\n"
"li t0, %0\n" /* Grant RWX permissions */
"csrw pmpcfg0, t0\n"
"csrw pmpcfg2, zero\n"
#ifdef CONFIG_MPFS_OPENSBI
"ld t0, g_hart_use_sbi\n" /* Load sbi usage bitmask */
"srl t0, t0, a0\n" /* Shift right by this hart */
@ -101,6 +112,9 @@ void mpfs_jump_to_app(void)
"add t0, t0, t1\n" /* Index in table */
"ld t0, 0(t0)\n" /* Load the address from table */
"jr t0\n" /* Jump to entrypoint */
:
: "i" (PMP_DEFAULT_PERM)
:
);
}