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; =============================================================================
; kdata.asm - kernel globals in fixed WRAM0 (always mapped, never swapped)
; =============================================================================
INCLUDE "include/gbos.inc"
SECTION "kernel_bss", WRAM0[$C000]
wProcTable:: DS MAX_PROCS * PROC_SIZE ; the process table
wCurProc:: DS 2 ; pointer to running PCB
wCurPid:: DS 1 ; running pid (reserved)
wNextPid:: DS 1 ; pid allocator
wSchedNext:: DS 1 ; round-robin cursor (slot index)
wKernelPCB:: DS PROC_SIZE ; outgoing-context holder for 1st switch
; (kernel/idle context; never resumed)
; scratch used by ProcCreate
wTmpEntry:: DS 2
wTmpRamB:: DS 1
wTmpWramB:: DS 1
wTmpSlot:: DS 1
wTmpPid:: DS 1
wTmpSP:: DS 2
; cart-RAM bank allocator: 0 = free, 1 = in use. bank 0 is the init task's.
wBankUsed:: DS NUM_RAM_BANKS
; scratch used by sys_fork
wForkUserSP:: DS 2 ; parent user SP at fork entry (= Uafter)
wForkChildSlot:: DS 1
wForkChildPid:: DS 1
wForkParentBank::DS 1
wForkChildBank:: DS 1
wCopyBuf:: DS 256 ; bank-copy bounce buffer (WRAM0, always mapped)
; scratch used by sys_exit / sys_wait
wExitMyPid:: DS 1
wExitParentPid:: DS 1
wWaitMyPid:: DS 1
wWaitRetPid:: DS 1
wWaitRetCode:: DS 1
; filesystem: open-file table + scratch
wOFTable:: DS OF_MAX * OF_SIZE
wFsMode:: DS 1
wFsSlot:: DS 1
wFsByte:: DS 1
wFsOFPtr:: DS 2
wFsCurBlk:: DS 1 ; data block currently in fs_datbuf ($FF = none)
wFsDirty:: DS 1 ; fs_datbuf needs write-back
wFsInode:: DS 1 ; working inode number
wFsNameBuf:: DS 16 ; kernel-side copy of a name/component
wFsDir:: DS 1 ; directory inode for dir_* ops
wFsDirBlk:: DS 1 ; that directory's data block (for write-back)
wFsCur:: DS 1 ; current inode during path resolution
wFsPath:: DS 40 ; kernel-side copy of a path argument
wFsSlashPtr::DS 2 ; last '/' seen while splitting a path
wListDir:: DS 1 ; directory sys_list enumerates
wKChar:: DS 1 ; scratch for KPutc
wKillParent::DS 1 ; scratch for sys_kill
wPsBuf:: DS 2 ; scratch for sys_ps
wPnStart:: DS 2 ; scratch for sys_progname
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