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am: use fb_base/fb_end as mc aperture (#13671)

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nimlgen 2025-12-13 17:29:03 +03:00 • committed by GitHub
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1 changed files with 2 additions and 3 deletions
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5
tinygrad/runtime/support/am/ip.py
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@ -39,7 +39,6 @@ class AM_GMC(AM_IP):
# Memory controller aperture
self.mc_base = self.fb_base + self.paddr_base
self.mc_end = self.mc_base + self.adev.mm.vram_size - 1
# VM aperture
self.vm_base = self.adev.mm.va_base
@ -97,8 +96,8 @@ class AM_GMC(AM_IP):
self.adev.reg(f"reg{ip}MC_VM_AGP_BOT").write(0xffffffffffff >> 24, inst=inst) # disable AGP
self.adev.reg(f"reg{ip}MC_VM_AGP_TOP").write(0, inst=inst)
self.adev.reg(f"reg{ip}MC_VM_SYSTEM_APERTURE_LOW_ADDR").write(self.mc_base >> 18, inst=inst)
self.adev.reg(f"reg{ip}MC_VM_SYSTEM_APERTURE_HIGH_ADDR").write(self.mc_end >> 18, inst=inst)
self.adev.reg(f"reg{ip}MC_VM_SYSTEM_APERTURE_LOW_ADDR").write(self.fb_base >> 18, inst=inst)
self.adev.reg(f"reg{ip}MC_VM_SYSTEM_APERTURE_HIGH_ADDR").write(self.fb_end >> 18, inst=inst)
self.adev.wreg_pair(f"reg{ip}MC_VM_SYSTEM_APERTURE_DEFAULT_ADDR", "_LSB", "_MSB", self.memscratch_xgmi_paddr >> 12, inst=inst)
self.adev.wreg_pair(f"reg{ip}VM_L2_PROTECTION_FAULT_DEFAULT_ADDR", "_LO32", "_HI32", self.dummy_page_xgmi_paddr >> 12, inst=inst)