diff options
Diffstat (limited to 'kernel/trampoline.S')
| -rw-r--r-- | kernel/trampoline.S | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/kernel/trampoline.S b/kernel/trampoline.S index 6e436d2..24499d9 100644 --- a/kernel/trampoline.S +++ b/kernel/trampoline.S @@ -25,10 +25,10 @@ uservec: # # swap a0 and sscratch - # so that a0 is p->tf + # so that a0 is TRAPFRAME csrrw a0, sscratch, a0 - # save the user registers in p->tf + # save the user registers in TRAPFRAME sd ra, 40(a0) sd sp, 48(a0) sd gp, 56(a0) @@ -86,22 +86,22 @@ uservec: .globl userret userret: - # userret(trapframe, pagetable) + # userret(TRAPFRAME, pagetable) # switch from kernel to user. # usertrapret() calls here. - # a0: p->tf in user page table - # a1: new value for satp, for user page table + # a0: TRAPFRAME, in user page table + # a1: user page table, for satp # switch to the user page table. sfence.vma zero, zero csrw satp, a1 # put the saved user a0 in sscratch, so we - # can swap it with our a0 (p->tf) in the last step. + # can swap it with our a0 (TRAPFRAME) in the last step. ld t0, 112(a0) csrw sscratch, t0 - # restore all but a0 from p->tf + # restore all but a0 from TRAPFRAME ld ra, 40(a0) ld sp, 48(a0) ld gp, 56(a0) @@ -133,7 +133,7 @@ userret: ld t5, 272(a0) ld t6, 280(a0) - # restore user a0, and save p->tf in sscratch + # restore user a0, and save TRAPFRAME in sscratch csrrw a0, sscratch, a0 # return to user mode and user pc. |