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| author | Xiang Wang <wxjstz@126.com> | 2018-10-11 17:42:49 +0800 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2018-11-05 09:03:50 +0000 |
| commit | 26f725efc235b282e20aa678f8e683a014920b71 (patch) | |
| tree | 3cab86c6a9218f727e321fcd93fb126a26097089 /src/arch/riscv | |
| parent | 7c9540ea1d46a776ec92b58f99074f51b430f9bb (diff) | |
| download | coreboot-26f725efc235b282e20aa678f8e683a014920b71.tar.xz | |
riscv: add support to block smp in each stage
Each stage performs some basic initialization (stack, HLS etc) and then
call smp_pause to enter the single-threaded state. The main work of each
stage is executed in a single-threaded state, and the multi-threaded
state is restored by call smp_resume while booting the next stage.
Change-Id: I8d508c3d0f65a022010e74f8edad7ad2cfdc7dee
Signed-off-by: Xiang Wang <wxjstz@126.com>
Reviewed-on: https://review.coreboot.org/29024
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Reviewed-by: Philipp Hug <philipp@hug.cx>
Diffstat (limited to 'src/arch/riscv')
| -rw-r--r-- | src/arch/riscv/boot.c | 8 | ||||
| -rw-r--r-- | src/arch/riscv/bootblock.S | 10 | ||||
| -rw-r--r-- | src/arch/riscv/ramstage.S | 3 | ||||
| -rw-r--r-- | src/arch/riscv/stages.c | 3 |
4 files changed, 16 insertions, 8 deletions
diff --git a/src/arch/riscv/boot.c b/src/arch/riscv/boot.c index e1dc61955b..04fba07234 100644 --- a/src/arch/riscv/boot.c +++ b/src/arch/riscv/boot.c @@ -19,6 +19,7 @@ #include <arch/encoding.h> #include <rules.h> #include <console/console.h> +#include <arch/smp/smp.h> /* * A pointer to the Flattened Device Tree passed to coreboot by the boot ROM. @@ -28,7 +29,7 @@ */ const void *rom_fdt; -void arch_prog_run(struct prog *prog) +static void do_arch_prog_run(struct prog *prog) { void (*doit)(void *) = prog_entry(prog); void riscvpayload(const void *fdt, void *payload); @@ -48,3 +49,8 @@ void arch_prog_run(struct prog *prog) doit(prog_entry_arg(prog)); } + +void arch_prog_run(struct prog *prog) +{ + smp_resume((void (*)(void *))do_arch_prog_run, prog); +} diff --git a/src/arch/riscv/bootblock.S b/src/arch/riscv/bootblock.S index 277c3910c0..7f84215dac 100644 --- a/src/arch/riscv/bootblock.S +++ b/src/arch/riscv/bootblock.S @@ -24,13 +24,6 @@ .global _estack .globl _start _start: - csrr a0, mhartid - li a3, 0 - beq a0, a3, _hart_zero -_hart_loop: - j _hart_loop -_hart_zero: - # The boot ROM may pass the following arguments to coreboot: # a0: the value of mhartid # a1: a pointer to the flattened devicetree @@ -59,6 +52,9 @@ _hart_zero: csrr a0, mhartid call hls_init + li a0, CONFIG_RISCV_WORKING_HARTID + call smp_pause + # initialize entry of interrupt/exception la t0, trap_entry csrw mtvec, t0 diff --git a/src/arch/riscv/ramstage.S b/src/arch/riscv/ramstage.S index c721a126c4..115a55f290 100644 --- a/src/arch/riscv/ramstage.S +++ b/src/arch/riscv/ramstage.S @@ -35,6 +35,9 @@ _start: csrr a0, mhartid call hls_init + li a0, CONFIG_RISCV_WORKING_HARTID + call smp_pause + # initialize entry of interrupt/exception la t0, trap_entry csrw mtvec, t0 diff --git a/src/arch/riscv/stages.c b/src/arch/riscv/stages.c index 80754762bd..4fe040934e 100644 --- a/src/arch/riscv/stages.c +++ b/src/arch/riscv/stages.c @@ -27,10 +27,13 @@ #include <arch/boot.h> #include <arch/encoding.h> #include <arch/stages.h> +#include <arch/smp/smp.h> #include <rules.h> void stage_entry(void) { + smp_pause(CONFIG_RISCV_WORKING_HARTID); + /* * Save the FDT pointer before entering ramstage, because mscratch * might be overwritten in the trap handler, and there is code in |