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Update spec and register offset for interrupts

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Signed-off-by: Alek Ratzloff <alekratz@gmail.com>
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Alek Ratzloff
2020-03-09 18:42:31 -04:00
parent 8c4a9991fd
commit 3522b3d0cd
2 changed files with 12 additions and 7 deletions
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10
vm.md
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@@ -228,16 +228,15 @@ wrapping around to 0.
* Push the IP of the next instruction to be called
* Push the FLAGS register
* Push the STATUS register
* Push the R0 register
* Push the R1 register
* Push the R0-R31 registers
* Update the IP (i.e., jump) to the address of the given interrupt vector in the IVT
* Update the R0 register to the value in the first parameter
* Update the R1 register to the value in the second parameter
* Update the frame pointer to the current stack pointer - 48
* Update the frame pointer to the current stack pointer - 288
* IRet
* Opcode: 0x3005
* When this instruction is executed, these actions occur:
* Update the stack pointer to the current frame pointer + 48
* Update the stack pointer to the current frame pointer + 288
* Pop the old R1 value
* Pop the old R0 value
* Pop the old STATUS value
@@ -410,8 +409,9 @@ A VM must provide support for the following meta-values:
# General TODO
* Memory permissions
* MMIO regions
* Paging?
* Paging
* Determine how address sizes are determined
* source size <= dest size - zero extend source and copy
* mov %r0, (label)u32