Add DDB interface to /sys/arch/mips/mips..
Rework heuristic stack traceback to work with DDB.
Add hooks to print exception log from DDB.
Add hooks from pmax console drivers: call Debugger()
after break from serial console, or 'DO' key from LK-xxx.
* cpuregs.h:
rename remaining VMMACH_xxx TLB macros to MIPS_TLB_xxx.
Add compile-time MIPS3-only, compile-time MIPS1-only, and
runtime (both) definitions for number of TLB ASIDs (tlb pids)
and shift count to extract a TLB pid.
* locore.h:
Delete unused vector slot for indexed TLB writes.
mips1 and mips3 TLBs are different enough that we have
to break them out at the caller anyway.
* Add compile-time MIPS3-only andcompile-time MIPS1-only
macros to call locore functions directly by name.
Use the existing method table only if
* mips/mips_machdep.c, mips/trap.c, mips/pmap.c, pmax/machdep.c:
Use MIPS3_ or MIPS1_ specific names for TLB pids in
mips3 and mips1 specific code paths (e.g., creating the kernel stack
for process 0).
Add `options MIPS3' to pmax/conf/GENERIC.
* cpuregs.h:
Delete unused VMMACH_ names (e.g., duplicates of PTE bits in pte.h).
Change remaining VMMACH_xxx names to MIPS1_xxx or MIPS3_xx.
Fold remaining compile-time definitions into a single #ifdef MIPS3.
* Use MIPS1_ names in locore_r2000.S, mips3_ names in locore_r4000.S
* Garbage-collect MachHitFlushDCache()
* psl.h:
use MIPS1_, MIPS3_ symbolic names for Cause register bits.
change _R3K to MIPS1_, _R4K to MIPS3. Conditionalize for mips1 only,
mips3 only, or when both are defined, use runtime CPUISMIPS3 test.
Remove cpu-specific routines from locore.S and add them to locore_r2000.S
and locore_r4000.S. Add entries in locore jump vector table for switch_exit()
and the cpu_switch() context resume.
Add offsets into the jump vector to genassym.cf for use in locore.S.
similar design and code by Jason Thorpe and Jonathan Stone.
NOTE: the kernel-stack-switching code and cacheflush() calls in
locore.S still use #ifdef MIPS3 and need more work.
mips/include/cpu.h:
Add CPUISMIPS3 for run-time tests of what CPU architecture level
we're running on.
mips/include/locore.h:
Add declarations of locore cache-size variables for ref/def toolchain.
mips/include/mips1_pte.h:
mips1 TLB bit definitions.
mips/include/mips3_pte.h:
mips3 TLB bit definitions.
mips/include/pte.h:
define accesor macros for TLB bits (e.g., mips_pg_m_bit(),
that expand to CPU constants if only one CPU arch is configured,
or to inline functions if both MIPS1 and MIPS3 are configured.
mips/mips/locore_r2000.S:
Use MIPS1_PG_xxx constants inside mips1-specific code.
mips/mips/locore_r4000.S:
Use MIPS3_PG_xxx constants inside mips3-specific code.
mips/mips/locore.S:
Use MIPS1_PG_xxx constants inside mips3-specific code.
Use MIPS1_PG_xxx constants inside mips1-specific code.
(Needs more work!)
mips/mips/{pmap.c,vm_machdep.c,trap.c}, pmax/pmax/machdep.c:
Use MIPS3_PG_xxx constants inside mips3-specific functions,
and MIPS1_PG_XXX inside mips1-specific code.
Otherwise, use mips_pg_XXX_bit() macros where they apply,
and use "if (CPUISMIPS3) { ... } else {... }" where they don't.
mips/mips/mips_machdep.c:
Import Michael Hitch's fixes from the pmax locore-init code
into mips_vector_init().
pmax/pmax/machdep.c:
Use generic mips_vector_init() locore vector-init function.
Move mips-specific pmap definitions (PMAP_PREFER for mips3, declaratin
of pmap_bootstrap() for the system-specific machdep.c) from
arch/pmax/include/pmap.h to arch/mips/include/pmap.h.
* Move declaration of locore communcation variables (CPU family,
cache sizes, etc) to mips/include/locore.h. Delete from
pmax/include/cpu.h and older versions from pica/include/cpu.h.
* Move definitions of CLKF_BASEPRI, CLKF_USERMODE to mips/include/cpu.
* Delete duplicate definitions in pica/include/cpu.h, pmax/include/cpu.h.
Change pmax/include/psl.h to just do #include <mips/psl.h>.
pmax/include/psl.h would go away completely if it wasn't stil required
by compat/common/kern_exit_43.c.
Fixes profiling for non-underscore-prepending toolchains
(elf, e.g., shared libs), and breaks a.out/ecoff toolchains.
May break mips kernel profiling too. Needs more thought, since the
original intent of __mcount vs ___mcount on mips date back to pre-1.0 days.
* handle interpreters with nonzero virtual address of entry-point:
subtract p_vaddr from computed entrypoint, as the mips elf exec did.
* Add #ifdef ELF_INTERP_NON_RELOCATABLE/#endif around the code
that tries to choose a `good' address at which to load an interpreter,
if none was set by the emul probe function.
(the address chosen could be improved to avoid fragmenting the
process virtual address space).
* define ELF_INTERP_NON_RELOCATABLE in machine/elf_machdep.h for mips CPUs,
which currently use a GNU-derived ld.so.
ELF_INTERP_NON_RELOCATABLE is not necessary for native NetBSD/alpha ELF
binaries. It may be required for GNU-derived ELF dynamic loaders (Linux/i386?)
perry