karina
6dd68f8162
- Bootloader: reallocate memory map buffer when ExitBootServices fails, so GetMemoryMap doesn't scribble past the old allocation on retry. - vectors.S: actually store sp_el0 into the exception frame. Previously it was read into x24 and then… vanished. EL0 tasks would wake up with a corrupted stack pointer. Not great. - Serial: split hardcoded 0x09000000 into a fallback default; add SerialUpdate() so the DTB-parsed UART address actually gets used. - DTB: add bounds check on reserved[] with PMM's 3 extra slots accounted for, so malformed/overstuffed DTBs don't silently corrupt memory. - PMM.h: bump kVMMaxReservedRegions 128→256, define kPMMReservedRegionCount. - Types.h: remove `#define loop while(1)`. while(true) is fine. - Rename IOSerial* → Serial* — the IO prefix was redundant, Serial.c already lives under IO/.
32 lines
661 B
C
32 lines
661 B
C
#include <IO/Serial.h>
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#include <Arch/IO.h>
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#include <Arch/CPU.h>
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static UInt64 sUARTAddress = kUARTBaseAddress;
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void SerialUpdate(UInt64 address) {
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sUARTAddress = address;
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}
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Int32 SerialPutCharacter(ASCII character) {
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// TXFF -- TRansmit FIFO Full for PL011 is 5 bit of FR reg (0x18)
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UInt64 uartFR = sUARTAddress + 0x18;
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while ((IOAddressRead32(uartFR) & (1 << 5)) != 0) {
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CPUYield();
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}
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IOAddressWrite32(sUARTAddress, character);
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return character;
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}
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Int32 SerialPutString(const ASCII* string) {
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Int i = 0;
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while (string[i] != '\0') {
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SerialPutCharacter(string[i]);
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i++;
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}
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return i;
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}
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