xref: /aosp_15_r20/external/coreboot/src/arch/riscv/boot.c (revision b9411a12aaaa7e1e6a6fb7c5e057f44ee179a49c)
1 /* SPDX-License-Identifier: GPL-2.0-only */
2 
3 #include <program_loading.h>
4 #include <vm.h>
5 #include <arch/boot.h>
6 #include <arch/encoding.h>
7 #include <arch/smp/smp.h>
8 #include <mcall.h>
9 #include <cbfs.h>
10 #include <console/console.h>
11 
12 struct arch_prog_run_args {
13 	struct prog *prog;
14 	struct prog *opensbi;
15 };
16 
17 /*
18  * A pointer to the Flattened Device Tree passed to coreboot by the boot ROM.
19  * Presumably this FDT is also in ROM.
20  *
21  * This pointer is only used in ramstage!
22  */
23 
do_arch_prog_run(struct arch_prog_run_args * args)24 static void do_arch_prog_run(struct arch_prog_run_args *args)
25 {
26 	int hart_id = HLS()->hart_id;
27 	struct prog *prog = args->prog;
28 	void *fdt = HLS()->fdt;
29 
30 	if (prog_cbfs_type(prog) == CBFS_TYPE_FIT_PAYLOAD)
31 		fdt = prog_entry_arg(prog);
32 
33 	if (ENV_RAMSTAGE && prog_type(prog) == PROG_PAYLOAD) {
34 		if (CONFIG(RISCV_OPENSBI)) {
35 			// tell OpenSBI to switch to Supervisor mode before jumping to payload
36 			run_payload_opensbi(prog, fdt, args->opensbi, RISCV_PAYLOAD_MODE_S);
37 		} else {
38 			run_payload(prog, fdt, RISCV_PAYLOAD_MODE_S);
39 		}
40 	} else {
41 		void (*doit)(int hart_id, void *fdt, void *arg) = prog_entry(prog);
42 		doit(hart_id, fdt, prog_entry_arg(prog));
43 	}
44 
45 	die("Failed to run stage");
46 }
47 
arch_prog_run(struct prog * prog)48 void arch_prog_run(struct prog *prog)
49 {
50 	struct arch_prog_run_args args = {};
51 
52 	args.prog = prog;
53 
54 	/* In case of OpenSBI we have to load it before resuming all HARTs */
55 	if (ENV_RAMSTAGE && CONFIG(RISCV_OPENSBI)) {
56 		struct prog sbi = PROG_INIT(PROG_OPENSBI, CONFIG_CBFS_PREFIX"/opensbi");
57 
58 		if (!selfload_check(&sbi, BM_MEM_OPENSBI))
59 			die("OpenSBI load failed");
60 
61 		args.opensbi = &sbi;
62 	}
63 
64 	smp_resume((void (*)(void *))do_arch_prog_run, &args);
65 }
66