From 6517fe26a2a0c89c3112f4a383c601572c71d64a Mon Sep 17 00:00:00 2001
From: Andrew Waterman <waterman@cs.berkeley.edu>
Date: Thu, 12 Mar 2015 17:38:04 -0700
Subject: Update to new privileged spec

---
 pk/sbi_entry.S | 61 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 pk/sbi_entry.S

(limited to 'pk/sbi_entry.S')

diff --git a/pk/sbi_entry.S b/pk/sbi_entry.S
new file mode 100644
index 0000000..33e998a
--- /dev/null
+++ b/pk/sbi_entry.S
@@ -0,0 +1,61 @@
+#include "encoding.h"
+#include "mcall.h"
+
+   .section .sbi,"ax",@progbits
+  .align RISCV_PGSHIFT
+  .globl sbi_base
+sbi_base:
+
+  # TODO: figure out something better to do with this space.  It's not
+  # protected from the OS, so beware.
+  .skip RISCV_PGSIZE - 2048
+
+  # hart_id
+  .align 4
+  li a0, MCALL_HART_ID
+  mcall
+  ret
+
+  # num_harts
+  .align 4
+  lw a0, num_harts
+  ret
+
+  # query_memory
+  .align 4
+  j __sbi_query_memory
+
+  # console_putchar
+  .align 4
+  mv a1, a0
+  li a0, MCALL_CONSOLE_PUTCHAR
+  mcall
+  ret
+
+  # send_device_request
+  .align 4
+  mv a1, a0
+  li a0, MCALL_SEND_DEVICE_REQUEST
+  mcall
+  ret
+
+  # receive_device_response
+  .align 4
+  mv a1, a0
+  li a0, MCALL_RECEIVE_DEVICE_RESPONSE
+  mcall
+  ret
+
+  # send ipi
+  .align 4
+  csrw send_ipi, a0
+  ret
+
+  # end of SBI trampolines
+
+  .globl do_mcall
+do_mcall:
+  mcall
+  ret
+
+  .align RISCV_PGSHIFT
-- 
cgit v1.1