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author ImJezze <jezze@gmx.net>2016-02-21 11:48:45 +0100
committer ImJezze <jezze@gmx.net>2016-02-21 11:48:45 +0100
commitcc24a339d8c0517259084b5c178d784626ba965c (patch)
tree9868e9687b5802ae0a3733712a3bbeb3bc75c953 /src/devices/cpu/vtlb.cpp
parentb5daabda5495dea5c50e17961ecfed2ea8619d76 (diff)
Merge remote-tracking branch 'refs/remotes/mamedev/master'
Second attempt
Diffstat (limited to 'src/devices/cpu/vtlb.cpp')
-rw-r--r--src/devices/cpu/vtlb.cpp310
1 files changed, 0 insertions, 310 deletions
diff --git a/src/devices/cpu/vtlb.cpp b/src/devices/cpu/vtlb.cpp
deleted file mode 100644
index 4c9a9a2f311..00000000000
--- a/src/devices/cpu/vtlb.cpp
+++ /dev/null
@@ -1,310 +0,0 @@
-// license:BSD-3-Clause
-// copyright-holders:Aaron Giles
-/***************************************************************************
-
- vtlb.c
-
- Generic virtual TLB implementation.
-
-***************************************************************************/
-
-#include "emu.h"
-#include "vtlb.h"
-
-
-
-/***************************************************************************
- DEBUGGING
-***************************************************************************/
-
-#define PRINTF_TLB (0)
-
-
-
-/***************************************************************************
- TYPE DEFINITIONS
-***************************************************************************/
-
-/* VTLB state */
-struct vtlb_state
-{
- cpu_device * cpudevice; /* CPU device */
- address_spacenum space; /* address space */
- int dynamic; /* number of dynamic entries */
- int fixed; /* number of fixed entries */
- int dynindex; /* index of next dynamic entry */
- int pageshift; /* bits to shift to get page index */
- int addrwidth; /* logical address bus width */
- std::vector<offs_t> live; /* array of live entries by table index */
- std::vector<int> fixedpages; /* number of pages each fixed entry covers */
- std::vector<vtlb_entry> table; /* table of entries by address */
-};
-
-
-
-/***************************************************************************
- INITIALIZATION/TEARDOWN
-***************************************************************************/
-
-/*-------------------------------------------------
- vtlb_alloc - allocate a new VTLB for the
- given CPU
--------------------------------------------------*/
-
-vtlb_state *vtlb_alloc(device_t *cpu, address_spacenum space, int fixed_entries, int dynamic_entries)
-{
- vtlb_state *vtlb;
-
- /* allocate memory for the core structure */
- vtlb = auto_alloc_clear(cpu->machine(), <vtlb_state>());
-
- /* fill in CPU information */
- vtlb->cpudevice = downcast<cpu_device *>(cpu);
- vtlb->space = space;
- vtlb->dynamic = dynamic_entries;
- vtlb->fixed = fixed_entries;
- const address_space_config *spaceconfig = device_get_space_config(*cpu, space);
- assert(spaceconfig != nullptr);
- vtlb->pageshift = spaceconfig->m_page_shift;
- vtlb->addrwidth = spaceconfig->m_logaddr_width;
-
- /* validate CPU information */
- assert((1 << vtlb->pageshift) > VTLB_FLAGS_MASK);
- assert(vtlb->addrwidth > vtlb->pageshift);
-
- /* allocate the entry array */
- vtlb->live.resize(fixed_entries + dynamic_entries);
- memset(&vtlb->live[0], 0, vtlb->live.size()*sizeof(vtlb->live[0]));
- cpu->save_item(NAME(vtlb->live));
-
- /* allocate the lookup table */
- vtlb->table.resize((size_t) 1 << (vtlb->addrwidth - vtlb->pageshift));
- memset(&vtlb->table[0], 0, vtlb->table.size()*sizeof(vtlb->table[0]));
- cpu->save_item(NAME(vtlb->table));
-
- /* allocate the fixed page count array */
- if (fixed_entries > 0)
- {
- vtlb->fixedpages.resize(fixed_entries);
- memset(&vtlb->fixedpages[0], 0, fixed_entries*sizeof(vtlb->fixedpages[0]));
- cpu->save_item(NAME(vtlb->fixedpages));
- }
- return vtlb;
-}
-
-
-/*-------------------------------------------------
- vtlb_free - free an allocated VTLB
--------------------------------------------------*/
-
-void vtlb_free(vtlb_state *vtlb)
-{
- auto_free(vtlb->cpudevice->machine(), vtlb);
-}
-
-
-
-/***************************************************************************
- FILLING
-***************************************************************************/
-
-/*-------------------------------------------------
- vtlb_fill - rcalled by the CPU core in
- response to an unmapped access
--------------------------------------------------*/
-
-int vtlb_fill(vtlb_state *vtlb, offs_t address, int intention)
-{
- offs_t tableindex = address >> vtlb->pageshift;
- vtlb_entry entry = vtlb->table[tableindex];
- offs_t taddress;
-
- if (PRINTF_TLB)
- printf("vtlb_fill: %08X(%X) ... ", address, intention);
-
- /* should not be called here if the entry is in the table already */
-// assert((entry & (1 << intention)) == 0);
-
- /* if we have no dynamic entries, we always fail */
- if (vtlb->dynamic == 0)
- {
- if (PRINTF_TLB)
- printf("failed: no dynamic entries\n");
- return FALSE;
- }
-
- /* ask the CPU core to translate for us */
- taddress = address;
- if (!vtlb->cpudevice->translate(vtlb->space, intention, taddress))
- {
- if (PRINTF_TLB)
- printf("failed: no translation\n");
- return FALSE;
- }
-
- /* if this is the first successful translation for this address, allocate a new entry */
- if ((entry & VTLB_FLAGS_MASK) == 0)
- {
- int liveindex = vtlb->dynindex++ % vtlb->dynamic;
-
- /* if an entry already exists at this index, free it */
- if (vtlb->live[liveindex] != 0)
- vtlb->table[vtlb->live[liveindex] - 1] = 0;
-
- /* claim this new entry */
- vtlb->live[liveindex] = tableindex + 1;
-
- /* form a new blank entry */
- entry = (taddress >> vtlb->pageshift) << vtlb->pageshift;
- entry |= VTLB_FLAG_VALID;
-
- if (PRINTF_TLB)
- printf("success (%08X), new entry\n", taddress);
- }
-
- /* otherwise, ensure that different intentions do not produce different addresses */
- else
- {
- assert((entry >> vtlb->pageshift) == (taddress >> vtlb->pageshift));
- assert(entry & VTLB_FLAG_VALID);
-
- if (PRINTF_TLB)
- printf("success (%08X), existing entry\n", taddress);
- }
-
- /* add the intention to the list of valid intentions and store */
- entry |= 1 << (intention & (TRANSLATE_TYPE_MASK | TRANSLATE_USER_MASK));
- vtlb->table[tableindex] = entry;
- return TRUE;
-}
-
-
-/*-------------------------------------------------
- vtlb_load - load a fixed VTLB entry
--------------------------------------------------*/
-
-void vtlb_load(vtlb_state *vtlb, int entrynum, int numpages, offs_t address, vtlb_entry value)
-{
- offs_t tableindex = address >> vtlb->pageshift;
- int liveindex = vtlb->dynamic + entrynum;
- int pagenum;
-
- /* must be in range */
- assert(entrynum >= 0 && entrynum < vtlb->fixed);
-
- if (PRINTF_TLB)
- printf("vtlb_load %d for %d pages at %08X == %08X\n", entrynum, numpages, address, value);
-
- /* if an entry already exists at this index, free it */
- if (vtlb->live[liveindex] != 0)
- {
- int pagecount = vtlb->fixedpages[entrynum];
- int oldtableindex = vtlb->live[liveindex] - 1;
- for (pagenum = 0; pagenum < pagecount; pagenum++)
- vtlb->table[oldtableindex + pagenum] = 0;
- }
-
- /* claim this new entry */
- vtlb->live[liveindex] = tableindex + 1;
-
- /* store the raw value, making sure the "fixed" flag is set */
- value |= VTLB_FLAG_FIXED;
- vtlb->fixedpages[entrynum] = numpages;
- for (pagenum = 0; pagenum < numpages; pagenum++)
- vtlb->table[tableindex + pagenum] = value + (pagenum << vtlb->pageshift);
-}
-
-/*-------------------------------------------------
- vtlb_dynload - load a dynamic VTLB entry
--------------------------------------------------*/
-
-void vtlb_dynload(vtlb_state *vtlb, UINT32 index, offs_t address, vtlb_entry value)
-{
- vtlb_entry entry = vtlb->table[index];
-
- if (vtlb->dynamic == 0)
- {
- if (PRINTF_TLB)
- printf("failed: no dynamic entries\n");
- return;
- }
-
- int liveindex = vtlb->dynindex++ % vtlb->dynamic;
- /* is entry already live? */
- if (!(entry & VTLB_FLAG_VALID))
- {
- /* if an entry already exists at this index, free it */
- if (vtlb->live[liveindex] != 0)
- vtlb->table[vtlb->live[liveindex] - 1] = 0;
-
- /* claim this new entry */
- vtlb->live[liveindex] = index + 1;
- }
- /* form a new blank entry */
- entry = (address >> vtlb->pageshift) << vtlb->pageshift;
- entry |= VTLB_FLAG_VALID | value;
-
- if (PRINTF_TLB)
- printf("success (%08X), new entry\n", address);
-
- vtlb->table[index] = entry;
-}
-
-/***************************************************************************
- FLUSHING
-***************************************************************************/
-
-/*-------------------------------------------------
- vtlb_flush_dynamic - flush all knowledge
- from the dynamic part of the VTLB
--------------------------------------------------*/
-
-void vtlb_flush_dynamic(vtlb_state *vtlb)
-{
- int liveindex;
-
- if (PRINTF_TLB)
- printf("vtlb_flush_dynamic\n");
-
- /* loop over live entries and release them from the table */
- for (liveindex = 0; liveindex < vtlb->dynamic; liveindex++)
- if (vtlb->live[liveindex] != 0)
- {
- offs_t tableindex = vtlb->live[liveindex] - 1;
- vtlb->table[tableindex] = 0;
- vtlb->live[liveindex] = 0;
- }
-}
-
-
-/*-------------------------------------------------
- vtlb_flush_address - flush knowledge of a
- particular address from the VTLB
--------------------------------------------------*/
-
-void vtlb_flush_address(vtlb_state *vtlb, offs_t address)
-{
- offs_t tableindex = address >> vtlb->pageshift;
-
- if (PRINTF_TLB)
- printf("vtlb_flush_address %08X\n", address);
-
- /* free the entry in the table; for speed, we leave the entry in the live array */
- vtlb->table[tableindex] = 0;
-}
-
-
-
-/***************************************************************************
- ACCESSORS
-***************************************************************************/
-
-/*-------------------------------------------------
- vtlb_table - return a pointer to the base of
- the linear VTLB lookup table
--------------------------------------------------*/
-
-const vtlb_entry *vtlb_table(vtlb_state *vtlb)
-{
- return &vtlb->table[0];
-}