iris/mips.hhp

#pypp 0
#ifndef _ARCH_HH
#define _ARCH_HH

#define PAGE_BITS (12)
#define PAGE_SIZE (1 << PAGE_BITS)
#define PAGE_MASK (~(PAGE_SIZE - 1))

struct Thread_arch:
	unsigned at, v0, v1, a0, a1, a2, a3
	unsigned t0, t1, t2, t3, t4, t5, t6, t7, t8, t9
	unsigned gp, fp, ra, hi, lo, k0, k1

struct Memory_arch:
	unsigned asid
	Page ***directory

static void Memory_arch_unmap (Memory *mem, Page *page, void *address)

#endif // _ARCH_HH

#ifdef ARCH_PART2
static void Thread_arch_init (Thread *thread):
	thread->arch.at = 0
	thread->arch.v0 = 0
	thread->arch.v1 = 0
	thread->arch.a0 = 0
	thread->arch.a1 = 0
	thread->arch.a2 = 0
	thread->arch.a3 = 0
	thread->arch.t0 = 0
	thread->arch.t1 = 0
	thread->arch.t2 = 0
	thread->arch.t3 = 0
	thread->arch.t4 = 0
	thread->arch.t5 = 0
	thread->arch.t6 = 0
	thread->arch.t7 = 0
	thread->arch.t8 = 0
	thread->arch.t9 = 0
	thread->arch.gp = 0
	thread->arch.fp = 0
	thread->arch.ra = 0
	thread->arch.hi = 0
	thread->arch.lo = 0
	thread->arch.k0 = 0
	thread->arch.k1 = 0

EXTERN unsigned g_asid

static void Memory_arch_init (Memory *mem):
	++g_asid
	g_asid &= 0x3f
	if !g_asid:
		++g_asid
	mem->arch.asid = g_asid
	mem->arch.directory = NULL

static void Memory_arch_free (Memory *mem):
	if !mem->arch.directory:
		return
	for unsigned i = 0; i < PAGE_SIZE; ++i:
		Page **table = mem->arch.directory[i]
		if !table:
			continue
		for unsigned j = 0; j < PAGE_SIZE; ++j:
			Page *page = table[j]
			if !page:
				continue
			mem->unmap (page, (void *)(i * 0x1000 * 0x400 + j * 0x1000))
		mem->unuse ()
		mem->zfree (table)
		mem->arch.directory[i] = NULL
	mem->unuse ()
	mem->zfree (mem->arch.directory)

static void Memory_arch_unmap (Memory *mem, Page *page, void *address):

// Functions which can be called from assembly must not be mangled.
extern "C":
	// Kernel entry points, called from entry.S.
	Thread *interrupt (Thread *current)
	Thread *cache_error (Thread *current)
	Thread *exception (Thread *current)
	Thread *tlb_refill (Thread *current, unsigned EntryHi)

	#ifdef INIT
	// Initialize most things (the rest is done in boot.S)
	void init ()
	// Start running the idle task for the first time.
	void run_idle (Thread *self)
	#endif

#endif	// ARCH_PART2