New patch to review for coreboot: [WIP] arch/riscv: Make SBI support optional

[Jonathan Neuschäfer]

Jonathan Neuschäfer ([e-mail]) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/15510

-gerrit

commit 757eb21bfb5850a536f3dce201fe5917cd622c7e
Author: Jonathan Neuschäfer 
Date:   Thu Jun 30 04:05:08 2016 +0200

[WIP] arch/riscv: Make SBI support optional

I'm posting this patch early so I can link to it from the wiki.

Change-Id: I5cbfc90afd3febab33835935f08005136a3f47e9
    Signed-off-by: Jonathan Neuschäfer 
---
 src/arch/riscv/boot.c           | 4 ++++
 src/arch/riscv/virtual_memory.c | 1 +
 2 files changed, 5 insertions(+)

diff --git a/src/arch/riscv/boot.c b/src/arch/riscv/boot.c
index 96526bf..e2d7d14 100644
--- a/src/arch/riscv/boot.c
+++ b/src/arch/riscv/boot.c
@@ -22,6 +22,7 @@ void arch_prog_run(struct prog *prog)
 {
    void (*doit)(void *) = prog_entry(prog);

+#if IS_ENABLED(CONFIG_RISCV_SBI)
    if (ENV_RAMSTAGE && prog_type(prog) == PROG_PAYLOAD) {
    	initVirtualMemory();
    	write_csr(mepc, doit);
@@ -29,6 +30,9 @@ void arch_prog_run(struct prog *prog)
    } else {
    	doit(prog_entry_arg(prog));
    }
+#else
+	doit(prog_entry_arg(prog));
+#endif
 }

int arch_supports_bounce_buffer(void)
diff --git a/src/arch/riscv/virtual_memory.c b/src/arch/riscv/virtual_memory.c
index 64ea2b1..dce0887 100644
--- a/src/arch/riscv/virtual_memory.c
+++ b/src/arch/riscv/virtual_memory.c
@@ -101,6 +101,7 @@ void init_vm(uintptr_t virtMemStart, uintptr_t physMemStart, uintptr_t pageTable

void initVirtualMemory(void) {
    printk(BIOS_DEBUG, "Initializing virtual memory...\n");
+	return;
    uintptr_t physicalStart = 0x1000000; // TODO: Figure out how to grab this from cbfs
    uintptr_t virtualStart = 0xffffffff81000000;
    uintptr_t pageTableStart = 0x1400000;