mirror of
git://projects.qi-hardware.com/iris.git
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102 lines
3.0 KiB
COBOL
102 lines
3.0 KiB
COBOL
#pypp 0
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#define ARCH
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#include "kernel.hh"
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void Thread_arch_init (Thread *thread):
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thread->arch.at = 0
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thread->arch.v0 = 0
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thread->arch.v1 = 0
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thread->arch.a0 = 0
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thread->arch.a1 = 0
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thread->arch.a2 = 0
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thread->arch.a3 = 0
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thread->arch.t0 = 0
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thread->arch.t1 = 0
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thread->arch.t2 = 0
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thread->arch.t3 = 0
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thread->arch.t4 = 0
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thread->arch.t5 = 0
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thread->arch.t6 = 0
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thread->arch.t7 = 0
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thread->arch.t8 = 0
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thread->arch.t9 = 0
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thread->arch.gp = 0
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thread->arch.fp = 0
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thread->arch.ra = 0
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thread->arch.hi = 0
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thread->arch.lo = 0
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thread->arch.k0 = 0
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thread->arch.k1 = 0
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void Memory_arch_init (Memory *mem):
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++g_asid
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if g_asid > 0x3f:
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g_asid = 1
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mem->arch.asid = g_asid
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mem->arch.directory = NULL
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void Memory_arch_free (Memory *mem):
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if !mem->arch.directory:
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return
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for unsigned i = 0; i < PAGE_SIZE; ++i:
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unsigned *table = mem->arch.directory[i]
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if !table:
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continue
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for unsigned j = 0; j < PAGE_SIZE; ++j:
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Page *page = (Page *)(table[j] & ~3)
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if !page:
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continue
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mem->unmap (page, i * 0x1000 * 0x400 + j * 0x1000)
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mem->unuse ()
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mem->zfree ((unsigned)table)
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mem->arch.directory[i] = NULL
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mem->unuse ()
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mem->zfree ((unsigned)mem->arch.directory)
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bool Memory_arch_map (Memory *mem, Page *page, unsigned address, bool write):
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unsigned *table = mem->arch.directory[(unsigned)address >> 22]
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if !table:
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table = (unsigned *)mem->zalloc ()
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if !table:
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return false
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mem->arch.directory[(unsigned)address >> 22] = table
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unsigned idx = ((unsigned)address >> 12) & ((1 << 10) - 1)
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if table[idx]:
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mem->unmap ((Page *)(table[idx] & ~3), address)
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table[idx] = write ? (unsigned)page : (unsigned)page + 1
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void Memory_arch_unmap (Memory *mem, Page *page, unsigned address):
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unsigned *table = mem->arch.directory[(unsigned)address >> 22]
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table[((unsigned)address >> 12) & ((1 << 10) - 1)] = 0
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Page *Memory_arch_get_mapping (Memory *mem, unsigned address):
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unsigned *table = mem->arch.directory[(unsigned)address >> 22]
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unsigned v = table[((unsigned)address >> 12) & ((1 << 10) - 1)]
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void Thread_arch_invoke ():
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Capability *target, *c0, *c1, *c2, *c3
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if current:
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target = current->address_space->find_capability (current->arch.v0)
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else:
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target = NULL
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if !target:
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// TODO: there must be no action here. This is just because the rest doesn't work yet.
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if current:
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led (current->arch.a0, current->arch.a1, current->arch.a2)
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dbg_sleep (1000)
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schedule ()
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return
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c0 = current->address_space->find_capability (current->arch.a0)
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c1 = current->address_space->find_capability (current->arch.a1)
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c2 = current->address_space->find_capability (current->arch.a2)
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c3 = current->address_space->find_capability (current->arch.a3)
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target->invoke (current->arch.t0, current->arch.t1, current->arch.t2, current->arch.t3, c0, c1, c2, c3)
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void arch_schedule (Thread *previous, Thread *target):
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if target:
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cp0_set (CP0_ENTRY_HI, target->address_space->arch.asid)
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else:
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// The idle tasks asid is 0.
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cp0_set (CP0_ENTRY_HI, 0)
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// TODO: flush TLB if the asid is already taken.
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