ref: cbf559e618ec9c384302bf6004ad6101e860109a
dir: /os/boot.original/puma/armv4.h/
/* * PSR */ #define PsrMusr 0x10 /* mode */ #define PsrMfiq 0x11 #define PsrMirq 0x12 #define PsrMsvc 0x13 #define PsrMabt 0x17 #define PsrMund 0x1B #define PsrMsys 0x1F #define PsrMask 0x1F #define PsrDfiq 0x00000040 /* disable FIQ interrupts */ #define PsrDirq 0x00000080 /* disable IRQ interrupts */ #define PsrV 0x10000000 /* overflow */ #define PsrC 0x20000000 /* carry/borrow/extend */ #define PsrZ 0x40000000 /* zero */ #define PsrN 0x80000000 /* negative/less than */ /* * Internal MMU coprocessor registers */ #define CpCPUID 0 /* R: */ #define CpControl 1 /* R: */ #define CpTTB 2 /* W: translation table base */ #define CpDAC 3 /* W: domain access control */ #define CpFSR 5 /* R: fault status */ #define CpTLBflush 5 /* W: */ #define CpFAR 6 /* R: fault address */ #define CpTLBpurge 6 /* W: */ #define CpCacheCtl 7 /* W: */ #define CpDebug 14 /* R/W: debug registers */ /* * Coprocessors */ #define CpMMU 15 /* * Internal MMU coprocessor registers */ #define CpCmmu 0x00000001 /* M: MMU enable */ #define CpCalign 0x00000002 /* A: alignment fault enable */ #define CpCDcache 0x00000004 /* C: instruction/data cache on */ #define CpCwb 0x00000008 /* W: write buffer turned on */ #define CpCi32 0x00000010 /* P: 32-bit programme space */ #define CpCd32 0x00000020 /* D: 32-bit data space */ #define CpCbe 0x00000080 /* B: big-endian operation */ #define CpCsystem 0x00000100 /* S: system permission */ #define CpCrom 0x00000200 /* R: ROM permission */ #define CpCIcache 0x00001000 /* C: Instruction Cache on */ /* * Debug support internal registers */ #define CpDBAR 0 #define CpDBVR 1 #define CpDBMR 2 #define CpDBCR 3 #define CpIBCR 8 /* * MMU */ /* * Small pages: * L1: 12-bit index -> 4096 descriptors -> 16Kb * L2: 8-bit index -> 256 descriptors -> 1Kb * Each L2 descriptor has access permissions for 4 1Kb sub-pages. * * TTB + L1Tx gives address of L1 descriptor * L1 descriptor gives PTBA * PTBA + L2Tx gives address of L2 descriptor * L2 descriptor gives PBA */ #define MmuTTB(pa) ((pa) & ~0x3FFF) /* translation table base */ #define MmuL1x(pa) (((pa)>>20) & 0xFFF) /* L1 table index */ #define MmuPTBA(pa) ((pa) & ~0x3FF) /* page table base address */ #define MmuL2x(pa) (((pa)>>12) & 0xFF) /* L2 table index */ #define MmuPBA(pa) ((pa) & ~0xFFF) /* page base address */ #define MmuSBA(pa) ((pa) & ~0xFFFFF) /* section base address */ #define MmuL1page 0x011 /* descriptor is for L2 pages */ #define MmuL1section 0x012 /* descriptor is for section */ #define MmuL2invalid 0x000 #define MmuL2large 0x001 /* large */ #define MmuL2small 0x002 /* small */ #define MmuWB 0x004 /* data goes through write buffer */ #define MmuIDC 0x008 /* data placed in cache */ #define MmuDAC(d) (((d) & 0xF)<<5) /* L1 domain */ #define MmuAP(i, v) ((v)<<(((i)*2)+4)) /* access permissions */ #define MmuL1AP(v) MmuAP(3, (v)) #define MmuL2AP(v) MmuAP(3, (v))|MmuAP(2, (v))|MmuAP(1, (v))|MmuAP(0, (v)) #define MmuAPsro 0 /* supervisor rw */ #define MmuAPsrw 1 /* supervisor rw */ #define MmuAPuro 2 /* supervisor rw + user ro */ #define MmuAPurw 3 /* supervisor rw + user rw */