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| author | Andrew Waterman <waterman@s141.Millennium.Berkeley.EDU> | 2010-08-18 18:24:55 -0700 |
|---|---|---|
| committer | Andrew Waterman <waterman@s141.Millennium.Berkeley.EDU> | 2010-08-18 18:24:55 -0700 |
| commit | 29cc0dc9854c66f12bd65e12516f68ccd9a741da (patch) | |
| tree | 23bd8147007d3d0fbb005f578f395e71f7d7d18d /pk/entry.S | |
| parent | e97220c9bf519b8e0f0b131a4f868331c4d526fb (diff) | |
| download | riscv-pk-29cc0dc9854c66f12bd65e12516f68ccd9a741da.zip riscv-pk-29cc0dc9854c66f12bd65e12516f68ccd9a741da.tar.gz riscv-pk-29cc0dc9854c66f12bd65e12516f68ccd9a741da.tar.bz2 | |
[pk,fesvr] improved proxykernel build system
Now uses a modified MCPPBS. Add --host=riscv to configure path.
Front-end server now just searches PATH for riscv-pk, so just install the pk
to somewhere in your path.
Diffstat (limited to 'pk/entry.S')
| -rw-r--r-- | pk/entry.S | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/pk/entry.S b/pk/entry.S new file mode 100644 index 0000000..db49a98 --- /dev/null +++ b/pk/entry.S @@ -0,0 +1,130 @@ + .text + .set noat + .ent save_tf +save_tf: # write the trap frame onto the stack + # save gprs + sd $1,8($k1) + sd $2,16($k1) + sd $3,24($k1) + sd $4,32($k1) + sd $5,40($k1) + sd $6,48($k1) + sd $7,56($k1) + sd $8,64($k1) + sd $9,72($k1) + sd $10,80($k1) + sd $11,88($k1) + sd $12,96($k1) + sd $13,104($k1) + sd $14,112($k1) + sd $15,120($k1) + sd $16,128($k1) + sd $17,136($k1) + sd $18,144($k1) + sd $19,152($k1) + sd $20,160($k1) + sd $21,168($k1) + sd $22,176($k1) + sd $23,184($k1) + sd $24,192($k1) + sd $25,200($k1) + sd $28,224($k1) + sd $29,232($k1) + sd $30,240($k1) + sd $k0,248($k1) # $ra is actually in $k0 + # get sr, epc, badvaddr + mfpcr $t0,$0 # sr + sd $t0,256($k1) + mfpcr $t0,$1 # epc + sd $t0,264($k1) + mfpcr $t0,$2 # badvaddr + sd $t0,272($k1) + jr $ra + .end save_tf + + .globl pop_tf + .ent pop_tf +pop_tf: # write the trap frame onto the stack + # restore gprs + ld $t0,256($a0) # restore sr, which should disable interrupts + mtpcr $t0,$0 + + move $k0,$a0 + ld $1,8($k0) + ld $2,16($k0) + ld $3,24($k0) + ld $4,32($k0) + ld $5,40($k0) + ld $6,48($k0) + ld $7,56($k0) + ld $8,64($k0) + ld $9,72($k0) + ld $10,80($k0) + ld $11,88($k0) + ld $12,96($k0) + ld $13,104($k0) + ld $14,112($k0) + ld $15,120($k0) + ld $16,128($k0) + ld $17,136($k0) + ld $18,144($k0) + ld $19,152($k0) + ld $20,160($k0) + ld $21,168($k0) + ld $22,176($k0) + ld $23,184($k0) + ld $24,192($k0) + ld $25,200($k0) + ld $28,224($k0) + ld $29,232($k0) + ld $30,240($k0) + ld $31,248($k0) + + # gtfo! + ld $k0,264($k0) + mtpcr $k0,$1 + eret + .end pop_tf + + + + #define TRAP_TABLE_ENTRY(x) \ + .align 7; \ + move $k0,$ra; \ + la $k1,stack_top-320; \ + jal save_tf; \ + move $sp,$k1; \ + move $a0,$k1; \ + ei; \ + jal x; \ + unimp + + .align 12 + .global trap_table + .ent trap_table +trap_table: + TRAP_TABLE_ENTRY(handle_illegal_instruction) + TRAP_TABLE_ENTRY(handle_privileged_instruction) + TRAP_TABLE_ENTRY(handle_fp_disabled) + TRAP_TABLE_ENTRY(handle_badtrap) + TRAP_TABLE_ENTRY(handle_misaligned_fetch) + TRAP_TABLE_ENTRY(handle_misaligned_ldst) + TRAP_TABLE_ENTRY(handle_fault_fetch) + TRAP_TABLE_ENTRY(handle_fault_ldst) + TRAP_TABLE_ENTRY(handle_syscall) + TRAP_TABLE_ENTRY(handle_breakpoint) + TRAP_TABLE_ENTRY(handle_badtrap) + TRAP_TABLE_ENTRY(handle_badtrap) + TRAP_TABLE_ENTRY(handle_badtrap) + TRAP_TABLE_ENTRY(handle_badtrap) + TRAP_TABLE_ENTRY(handle_badtrap) + TRAP_TABLE_ENTRY(handle_badtrap) + .align 12 + .end trap_table + + .bss + .global stack_bot + .global stack_top +stack_bot: + .skip 4096 +stack_top: |