Initial drop

Add some riscv code

Signed-off-by: Carlos Maiolino <[email protected]>

3 files changed, 71 insertions, 0 deletions

diff --git a/riscv/riscv-probe/env/spike/crt.s b/riscv/riscv-probe/env/spike/crt.s
new file mode 100644
index 0000000..dcdf1e1
--- /dev/null
+++ b/riscv/riscv-probe/env/spike/crt.s
@@ -0,0 +1 @@
+.include "crtm.s"
diff --git a/riscv/riscv-probe/env/spike/default.lds b/riscv/riscv-probe/env/spike/default.lds
new file mode 100644
index 0000000..eb78711
--- /dev/null
+++ b/riscv/riscv-probe/env/spike/default.lds
@@ -0,0 +1,52 @@
+OUTPUT_ARCH( "riscv" )
+
+ENTRY( _start )
+
+MEMORY
+{
+  ram   (wxa!ri) : ORIGIN = 0x80000000, LENGTH = 128M
+}
+
+PHDRS
+{
+  text PT_LOAD;
+  data PT_LOAD;
+  bss PT_LOAD;
+  htif PT_LOAD;
+}
+
+SECTIONS
+{
+  .text : {
+    PROVIDE(_text_start = .);
+    *(.text.init) *(.text .text.*)
+    PROVIDE(_text_end = .);
+  } >ram AT>ram :text
+
+  .rodata : {
+    PROVIDE(_rodata_start = .);
+    *(.rodata .rodata.*)
+    PROVIDE(_rodata_end = .);
+  } >ram AT>ram :text
+
+  .htif   : {
+    . = ALIGN(4096);
+    *(.htif)
+  } >ram AT>ram :text
+
+  .data : {
+    . = ALIGN(4096);
+    PROVIDE(_data_start = .);
+    *(.sdata .sdata.*) *(.data .data.*)
+    PROVIDE(_data_end = .);
+  } >ram AT>ram :data
+
+  .bss :{
+    PROVIDE(_bss_start = .);
+    *(.sbss .sbss.*) *(.bss .bss.*)
+    PROVIDE(_bss_end = .);
+  } >ram AT>ram :bss
+
+  PROVIDE(_memory_start = ORIGIN(ram));
+  PROVIDE(_memory_end = ORIGIN(ram) + LENGTH(ram));
+}
diff --git a/riscv/riscv-probe/env/spike/setup.c b/riscv/riscv-probe/env/spike/setup.c
new file mode 100644
index 0000000..54d4bf1
--- /dev/null
+++ b/riscv/riscv-probe/env/spike/setup.c
@@ -0,0 +1,18 @@
+// See LICENSE for license details.
+
+#include "femto.h"
+
+extern uint64_t tohost;
+extern uint64_t fromhost;
+
+auxval_t __auxv[] = {
+    { RISCV_HTIF_BASE_ADDR, 0 },
+    { 0, 0 }
+};
+
+void arch_setup()
+{
+	__auxv[0].val = (uintptr_t)(&tohost < &fromhost ? &tohost : &fromhost);
+    register_console(&console_htif);
+    register_poweroff(&poweroff_htif);
+}