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3f92aab6e7
cortex-a -> 2.2.1 panic-abort -> 0.3.1 |
6 years ago | |
|---|---|---|
| .. | ||
| .cargo | 6 years ago | |
| raspi3_boot | 6 years ago | |
| src | 6 years ago | |
| Cargo.lock | 6 years ago | |
| Cargo.toml | 6 years ago | |
| Makefile | 6 years ago | |
| README.md | 6 years ago | |
| kernel8 | 6 years ago | |
| kernel8.img | 6 years ago | |
| link.ld | 6 years ago | |
README.md
Tutorial 0B - Exception Levels
This is a stub
This tutorial covers a very exciting and central feature of the Raspberry Pi's
Cortex-A53 processor: Exception levels.
TODO: Write rest of tutorial.
raspi3_boot::setup_and_enter_el1_from_el2::h0641a5a5302db706:
80954: e8 03 1f aa mov x8, xzr
80958: e9 07 00 32 orr w9, wzr, #0x3
8095c: 4a 00 80 52 mov w10, #0x2
80960: 0a 00 b0 72 movk w10, #0x8000, lsl #16
80964: 09 e1 1c d5 msr CNTHCTL_EL2, x9
80968: 68 e0 1c d5 msr CNTVOFF_EL2, x8
8096c: 08 00 00 90 adrp x8, #0x0
80970: 8b 78 80 52 mov w11, #0x3c4
80974: 0a 11 1c d5 msr HCR_EL2, x10
80978: ec 03 0d 32 orr w12, wzr, #0x80000
8097c: 08 81 24 91 add x8, x8, #0x920
80980: 0b 40 1c d5 msr SPSR_EL2, x11
80984: 28 40 1c d5 msr ELR_EL2, x8
80988: 0c 41 18 d5 msr SP_EL0, x12
8098c: e0 03 9f d6 eret