diff options
Diffstat (limited to 'bsp')
| -rw-r--r-- | bsp/env/ventry.S | 161 |
1 files changed, 46 insertions, 115 deletions
diff --git a/bsp/env/ventry.S b/bsp/env/ventry.S index ed79789..6b672e5 100644 --- a/bsp/env/ventry.S +++ b/bsp/env/ventry.S @@ -6,123 +6,54 @@ #include "encoding.h" #include "sifive/bits.h" +#only save caller registers .macro TRAP_ENTRY - addi sp, sp, -32*REGBYTES - - STORE x1, 1*REGBYTES(sp) - STORE x2, 2*REGBYTES(sp) - STORE x3, 3*REGBYTES(sp) - STORE x4, 4*REGBYTES(sp) - STORE x5, 5*REGBYTES(sp) - STORE x6, 6*REGBYTES(sp) - STORE x7, 7*REGBYTES(sp) - STORE x8, 8*REGBYTES(sp) - STORE x9, 9*REGBYTES(sp) - STORE x10, 10*REGBYTES(sp) - STORE x11, 11*REGBYTES(sp) - STORE x12, 12*REGBYTES(sp) - STORE x13, 13*REGBYTES(sp) - STORE x14, 14*REGBYTES(sp) - STORE x15, 15*REGBYTES(sp) - STORE x16, 16*REGBYTES(sp) - STORE x17, 17*REGBYTES(sp) - STORE x18, 18*REGBYTES(sp) - STORE x19, 19*REGBYTES(sp) - STORE x20, 20*REGBYTES(sp) - STORE x21, 21*REGBYTES(sp) - STORE x22, 22*REGBYTES(sp) - STORE x23, 23*REGBYTES(sp) - STORE x24, 24*REGBYTES(sp) - STORE x25, 25*REGBYTES(sp) - STORE x26, 26*REGBYTES(sp) - STORE x27, 27*REGBYTES(sp) - STORE x28, 28*REGBYTES(sp) - STORE x29, 29*REGBYTES(sp) - STORE x30, 30*REGBYTES(sp) - STORE x31, 31*REGBYTES(sp) + addi sp, sp, -18*REGBYTES + + STORE x1, 1*REGBYTES(sp) + STORE x5, 2*REGBYTES(sp) + STORE x6, 3*REGBYTES(sp) + STORE x7, 4*REGBYTES(sp) + STORE x10, 5*REGBYTES(sp) + STORE x11, 6*REGBYTES(sp) + STORE x12, 7*REGBYTES(sp) + STORE x13, 8*REGBYTES(sp) + STORE x14, 9*REGBYTES(sp) + STORE x15, 10*REGBYTES(sp) + STORE x16, 11*REGBYTES(sp) + STORE x17, 12*REGBYTES(sp) + STORE x18, 13*REGBYTES(sp) + STORE x28, 14*REGBYTES(sp) + STORE x29, 15*REGBYTES(sp) + STORE x30, 16*REGBYTES(sp) + STORE x31, 17*REGBYTES(sp) .endm +#restore caller registers .macro TRAP_EXIT # Remain in M-mode after mret li t0, MSTATUS_MPP csrs mstatus, t0 - LOAD x1, 1*REGBYTES(sp) - LOAD x2, 2*REGBYTES(sp) - LOAD x3, 3*REGBYTES(sp) - LOAD x4, 4*REGBYTES(sp) - LOAD x5, 5*REGBYTES(sp) - LOAD x6, 6*REGBYTES(sp) - LOAD x7, 7*REGBYTES(sp) - LOAD x8, 8*REGBYTES(sp) - LOAD x9, 9*REGBYTES(sp) - LOAD x10, 10*REGBYTES(sp) - LOAD x11, 11*REGBYTES(sp) - LOAD x12, 12*REGBYTES(sp) - LOAD x13, 13*REGBYTES(sp) - LOAD x14, 14*REGBYTES(sp) - LOAD x15, 15*REGBYTES(sp) - LOAD x16, 16*REGBYTES(sp) - LOAD x17, 17*REGBYTES(sp) - LOAD x18, 18*REGBYTES(sp) - LOAD x19, 19*REGBYTES(sp) - LOAD x20, 20*REGBYTES(sp) - LOAD x21, 21*REGBYTES(sp) - LOAD x22, 22*REGBYTES(sp) - LOAD x23, 23*REGBYTES(sp) - LOAD x24, 24*REGBYTES(sp) - LOAD x25, 25*REGBYTES(sp) - LOAD x26, 26*REGBYTES(sp) - LOAD x27, 27*REGBYTES(sp) - LOAD x28, 28*REGBYTES(sp) - LOAD x29, 29*REGBYTES(sp) - LOAD x30, 30*REGBYTES(sp) - LOAD x31, 31*REGBYTES(sp) - - addi sp, sp, 32*REGBYTES - mret -.endm - - - -.macro TRAP_ENTRY2 - addi sp, sp, -14*REGBYTES - - STORE x2, 1*REGBYTES(sp) - STORE x8, 2*REGBYTES(sp) - STORE x9, 3*REGBYTES(sp) - STORE x18, 4*REGBYTES(sp) - STORE x19, 5*REGBYTES(sp) - STORE x20, 6*REGBYTES(sp) - STORE x21, 7*REGBYTES(sp) - STORE x22, 8*REGBYTES(sp) - STORE x23, 9*REGBYTES(sp) - STORE x24, 10*REGBYTES(sp) - STORE x25, 11*REGBYTES(sp) - STORE x26, 12*REGBYTES(sp) - STORE x27, 13*REGBYTES(sp) -.endm - -.macro TRAP_EXIT2 -# Remain in M-mode after mret - li t0, MSTATUS_MPP - csrs mstatus, t0 - - LOAD x3, 1*REGBYTES(sp) - LOAD x8, 2*REGBYTES(sp) - LOAD x9, 3*REGBYTES(sp) - LOAD x18, 4*REGBYTES(sp) - LOAD x19, 5*REGBYTES(sp) - LOAD x20, 6*REGBYTES(sp) - LOAD x21, 7*REGBYTES(sp) - LOAD x22, 8*REGBYTES(sp) - LOAD x23, 9*REGBYTES(sp) - LOAD x24, 10*REGBYTES(sp) - LOAD x25, 11*REGBYTES(sp) - LOAD x26, 12*REGBYTES(sp) - LOAD x27, 13*REGBYTES(sp) - - addi sp, sp, 14*REGBYTES + LOAD x1, 1*REGBYTES(sp) + LOAD x5, 2*REGBYTES(sp) + LOAD x6, 3*REGBYTES(sp) + LOAD x7, 4*REGBYTES(sp) + LOAD x10, 5*REGBYTES(sp) + LOAD x11, 6*REGBYTES(sp) + LOAD x12, 7*REGBYTES(sp) + LOAD x13, 8*REGBYTES(sp) + LOAD x14, 9*REGBYTES(sp) + LOAD x15, 10*REGBYTES(sp) + LOAD x16, 11*REGBYTES(sp) + LOAD x17, 12*REGBYTES(sp) + LOAD x18, 13*REGBYTES(sp) + LOAD x28, 14*REGBYTES(sp) + LOAD x29, 15*REGBYTES(sp) + LOAD x30, 16*REGBYTES(sp) + LOAD x31, 17*REGBYTES(sp) + + addi sp, sp, 18*REGBYTES mret .endm @@ -216,15 +147,15 @@ vmsi_Handler: #Machine Timer Interrupt vmti_Handler: - TRAP_ENTRY2 + TRAP_ENTRY jal handle_m_time_interrupt - TRAP_EXIT2 + TRAP_EXIT #Machine External Interrupt vmei_Handler: - TRAP_ENTRY2 + TRAP_ENTRY jal handle_m_external_interrupt - TRAP_EXIT2 + TRAP_EXIT #LIP0 vlip_Handler0: @@ -258,9 +189,9 @@ vlip_Handler4: #LIP5 vlip_Handler5: - TRAP_ENTRY2 + TRAP_ENTRY jal handle_local_interrupt5 - TRAP_EXIT2 + TRAP_EXIT #LIP6 vlip_Handler6: |