Firmware/opensbi
8
0
Fork 0
forked from Mirrors/opensbi
Code Pull Requests Activity

lib: sbi: Add initial domain support

Browse Source 
An OpenSBI domain is a logical entity representing a set of HARTs
and a set of memory regions for these HARTs.

The OpenSBI domains support will allow OpenSBI platforms and previous
booting stage (i.e. U-Boot SPL, Coreboot, etc) to partition a system
into multiple domains where each domain will run it's own software.

For inter-domain isolation, OpenSBI will eventually use various HW
features such as PMP, ePMP, IOPMP, SiFive shield, etc but initial
implementation only use HW PMP support.

This patch provides initial implementation of OpenSBI domains where
we have a root/default domain and OpenSBI platforms can provide
non-root/custom domains using domain_get() callback.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
This commit is contained in:
Anup Patel
2020-09-18 17:07:49 +05:30
committed by Anup Patel
parent 8b650050ec
commit b1678af210
5 changed files with 568 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
lib/sbi/sbi_init.c
View File

@@ -12,6 +12,7 @@
#include <sbi/riscv_barrier.h>
#include <sbi/riscv_locks.h>
#include <sbi/sbi_console.h>
#include <sbi/sbi_domain.h>
#include <sbi/sbi_ecall.h>
#include <sbi/sbi_hart.h>
#include <sbi/sbi_hartmask.h>
@@ -169,6 +170,11 @@ static void __noreturn init_coldboot(struct sbi_scratch *scratch, u32 hartid)
if (rc)
sbi_hart_hang();
/* Note: This has to be second thing in coldboot init sequence */
rc = sbi_domain_init(scratch, hartid);
if (rc)
sbi_hart_hang();
init_count_offset = sbi_scratch_alloc_offset(__SIZEOF_POINTER__,
"INIT_COUNT");
if (!init_count_offset)
@@ -210,10 +216,24 @@ static void __noreturn init_coldboot(struct sbi_scratch *scratch, u32 hartid)
if (rc)
sbi_hart_hang();
/*
* Note: Finalize domains after HSM initialization so that we
* can startup non-root domains.
* Note: Finalize domains before HART PMP configuration so
* that we use correct domain for configuring PMP.
*/
rc = sbi_domain_finalize(scratch, hartid);
if (rc)
sbi_hart_hang();
rc = sbi_hart_pmp_configure(scratch);
if (rc)
sbi_hart_hang();
/*
* Note: Platform final initialization should be last so that
* it sees correct domain assignment and PMP configuration.
*/
rc = sbi_platform_final_init(plat, TRUE);
if (rc)
sbi_hart_hang();