diff options
Diffstat (limited to 'cpu/amd/geode_lx/gplvsa_ii/lxvg/decode.c')
| -rwxr-xr-x | cpu/amd/geode_lx/gplvsa_ii/lxvg/decode.c | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/cpu/amd/geode_lx/gplvsa_ii/lxvg/decode.c b/cpu/amd/geode_lx/gplvsa_ii/lxvg/decode.c new file mode 100755 index 0000000..5fa8918 --- /dev/null +++ b/cpu/amd/geode_lx/gplvsa_ii/lxvg/decode.c @@ -0,0 +1,194 @@ +/*
+* Copyright (c) 2007-2008 Advanced Micro Devices,Inc. ("AMD").
+*
+* This library is free software; you can redistribute it and/or modify
+* it under the terms of the GNU Lesser General Public License as
+* published by the Free Software Foundation; either version 2.1 of the
+* License, or (at your option) any later version.
+*
+* This code is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+* Lesser General Public License for more details.
+
+* You should have received a copy of the GNU Lesser General
+* Public License along with this library; if not, write to the
+* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
+* Boston, MA 02111-1307 USA
+*/
+// This module decodes the SoftVG SMI sources.
+
+
+#include "lxvg.h"
+#include "vsa2.h"
+#include "vr.h"
+#include "pci.h"
+
+extern void pascal out_8(USHORT, UCHAR);
+extern void pascal out_16(USHORT, USHORT);
+extern UCHAR pascal in_8(USHORT);
+extern USHORT pascal in_16(USHORT);
+
+//---------------------------------------------------------------------------
+// virtual_register_event
+//
+// This routine is called when LXVG receives a VRC_VG virtual register
+// access event.
+//
+//---------------------------------------------------------------------------
+
+void virtual_register_event(unsigned char reg, unsigned long rwFlag, unsigned long vrData)
+{
+
+ // Look for virtual register read case first
+ if (!(rwFlag & SMM_VR_WRITE))
+ {
+ // Determine if we are initialized
+ if (!(VGState & SF_SECONDARY))
+ {
+ SET_AX(0xFFFF);
+ }else{
+ SET_AX(vReg[reg]);
+ }
+ return;
+ }
+
+ // If we get here, we know its a write, so handle the requests
+ switch (reg)
+ {
+ case VG_CONFIG:
+ // We only need to initialize once!
+ if (!(VGState & SF_SECONDARY))
+ {
+ // Initialize the secondary controller portion of the engine.
+ lxvg_initialize((unsigned short)vrData);
+
+ // REGISTER PCI EVENTS - DO NOT ENABLE PCI EVENTS IF DISABLED.
+
+ if (VGState & SF_SECONDARY)
+ {
+ // If we've initialized to the secondary state, we need to support
+ // PCI config accesses. If we are disabled, the SysMgr will handle
+ // the support. We may be initialized to the primary state, but the
+ // minimum level is secondary.
+ SYS_REGISTER_EVENT(EVENT_PCI_TRAP, vga_config_addr, 0xFF, NORMAL_PRIORITY);
+ }
+ }
+ break;
+
+ default:
+ break;
+ }
+
+ // Finally, store the data...
+ vReg[reg] = (unsigned short)vrData;
+
+ return;
+}
+
+//---------------------------------------------------------------------------
+// pci_trap_event
+//
+// This routine is called when the VSA2 system manager receives an SMI for
+// a PCI configuration cycle that we have registered for.
+//
+// The "flags" parameter indicates the size in bits [3:0] (0x1 = byte,
+// 0x3 = word, and 0xF = dword). Bit 7 indicates a write.
+//---------------------------------------------------------------------------
+
+void pci_trap_event(unsigned long address, unsigned long flags, unsigned long data)
+{
+ unsigned char reg = (unsigned char) address & 0x000000FF;
+ unsigned char size = (unsigned char) flags & 0x0000000F;
+ unsigned long pciSave;
+
+ if ((address & PCI_CONFIG_MASK) == vga_config_addr)
+ {
+
+ // CHECK IF PCI WRITE
+ if (flags & PCI_TRAP_WRITE)
+ {
+ // Handle the trapped register writes
+ if (reg == PCI_CMD_REG)
+ {
+ if ((unsigned char)data & PCI_MEM_SPACE)
+ // Change the frame buffer base realated stuff.
+ hw_fb_map_init(framebuffer_base);
+ }
+ else if ((reg >= BAR0) && (reg <= BAR4))
+ {
+ // NOTE: SysMgr now delivers DWORD aligned values with all reserved bits zeroed.
+ if ((data < VGdata.pci_fb_mask) && (data != 0L))
+ {
+ // We have to assume that the changing agent won't put the framebuffer
+ // on top of program memory. The check for zero above was added when
+ // Windows was observed clearing out the BARS by writing 0's to them.
+ // This is still susceptible to failure due to bad address choices by
+ // the changing agent.
+ switch (reg)
+ {
+ case BAR0:
+ if ((data != framebuffer_base) && (data >= 0x1000000))
+ {
+ // Set the frame buffer base.
+ framebuffer_base = data;
+
+ // If the PCI memory is on, change the framebuffer base
+ // related stuff.
+ pciSave = READ_PCI_DWORD_NO_TRAP(PCI_CMD_REG);
+ if (pciSave & PCI_MEM_SPACE)
+ // Change the frame buffer base realated stuff.
+ hw_fb_map_init(framebuffer_base);
+ }
+ break;
+
+ case BAR1:
+ // Set the GP register base
+ GPregister_base = data;
+ break;
+
+ case BAR2:
+ // Set the VG register base
+ VGregister_base = data;
+ break;
+
+ case BAR3:
+ // Set the DF register base
+ DFregister_base = data;
+ break;
+
+ case BAR4:
+ // Set the VIP register base
+ VIPregister_base = data;
+ break;
+ }
+ }
+ }
+ }
+ else
+ {
+ // Always mask off the invalid bits, but preserve the
+ // bottom 4 bits.
+ if (size == DWORD_IO)
+ {
+ pciSave = GET_EAX();
+ switch (reg)
+ {
+ case BAR0:
+ pciSave &= VGdata.pci_fb_mask | 0x0000000F;
+ break;
+
+ case BAR1:
+ case BAR2:
+ case BAR3:
+ case BAR4:
+ pciSave &= MASK16K;
+ break;
+ }
+ SET_EAX(pciSave);
+ }
+ }
+ }
+}
+
+// END OF FILE
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