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→ReadRegister32Ex: describe other legacy register blocks
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The kernel runs in supervisor mode on the PowerPC, and performs the basic tasks of a microkernel. It is responsible for process isolation, memory management, and interrupt dispatching, as well as communication with [[IOSU]]. Cafe OS applications run as user mode processes, with separate address spaces and W^X memory protection.
The kernel runs in supervisor mode on the PowerPC, and performs the basic tasks of a microkernel. It is responsible for process isolation, memory management, and interrupt dispatching, as well as communication with [[IOSU]]. Cafe OS applications run as user mode processes, with separate address spaces and W^X memory protection.
−== SysCalls ==
+== Syscalls ==
Cafe OS syscalls are issued by doing the following:
Cafe OS syscalls are issued by doing the following:
li r0, 0x0100 # load syscall value->r0
li r0, 0x0100 # load syscall value->r0
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−== FastCalls ==
+== Fastcalls ==
Fastcalls, on the other hand, are system calls that aren't routed through the dispatcher and can be accessed by any RAMPID.
Fastcalls, on the other hand, are system calls that aren't routed through the dispatcher and can be accessed by any RAMPID.
Attempting to access an unimplemented fastcall will redirect the code flow to syscall 0x0100 (AppPanic).
Attempting to access an unimplemented fastcall will redirect the code flow to syscall 0x0100 (AppPanic).
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0xFD040250 // 4 registers at 0x0D000250 (HW_I2CMCTRL to HW_I2CMDATARD)
0xFD040250 // 4 registers at 0x0D000250 (HW_I2CMCTRL to HW_I2CMDATARD)
0xFD060520 // 6 registers at 0x0D000520 (LT_GPIOPPCOUT to LT_GPIOPPCINTEN)
0xFD060520 // 6 registers at 0x0D000520 (LT_GPIOPPCOUT to LT_GPIOPPCINTEN)
− 0xFD106400 // 16 registers at 0x0D006400
+ 0xFD106400 // 16 registers at 0x0D006400 (SI0_OUTBUF to SIEXI_LOCK)
− 0xFD046C00 // 4 registers at 0x0D006C00
+ 0xFD046C00 // 4 registers at 0x0D006C00 (AI_CR to AI_IT)
0xFD046E00 // 4 registers at 0x0D006E00
0xFD046E00 // 4 registers at 0x0D006E00
0xFD0F6800 // 15 registers at 0x0D006800 (EXI0_CSR to EXI2_DATA)
0xFD0F6800 // 15 registers at 0x0D006800 (EXI0_CSR to EXI2_DATA)