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| author | Andrew Waterman <waterman@cs.berkeley.edu> | 2015-03-12 17:38:04 -0700 |
|---|---|---|
| committer | Andrew Waterman <waterman@cs.berkeley.edu> | 2015-03-12 17:38:04 -0700 |
| commit | 6517fe26a2a0c89c3112f4a383c601572c71d64a (patch) | |
| tree | d37eea7ae6f3e15eee94afb5c9c749a4cd800577 /pk/sbi_entry.S | |
| parent | a4ae7da6ef0c09c2616a0b82f7f569e4e134f75c (diff) | |
| download | pk-6517fe26a2a0c89c3112f4a383c601572c71d64a.zip pk-6517fe26a2a0c89c3112f4a383c601572c71d64a.tar.gz pk-6517fe26a2a0c89c3112f4a383c601572c71d64a.tar.bz2 | |
Update to new privileged spec
Diffstat (limited to 'pk/sbi_entry.S')
| -rw-r--r-- | pk/sbi_entry.S | 61 |
1 files changed, 61 insertions, 0 deletions
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 |