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author hap <happppp@users.noreply.github.com>2021-11-24 12:19:39 +0100
committer hap <happppp@users.noreply.github.com>2021-11-24 12:19:39 +0100
commiteb7996ee5a333e6fab4756081ee6e7147e804d88 (patch)
treedb7a0b634caecdfc00eb9ac8b4ea9e6ace8c7353
parentbbc35b4f29c889b04e101df213d242fbbbd690cb (diff)
sparc: assume that sparclite waitstate page check is per cs
-rw-r--r--src/devices/bus/saitek_osa/sparc.cpp2
-rw-r--r--src/devices/cpu/sparc/sparc.cpp18
-rw-r--r--src/devices/cpu/sparc/sparc.h2
3 files changed, 11 insertions, 11 deletions
diff --git a/src/devices/bus/saitek_osa/sparc.cpp b/src/devices/bus/saitek_osa/sparc.cpp
index 0517b158686..3564b801be1 100644
--- a/src/devices/bus/saitek_osa/sparc.cpp
+++ b/src/devices/bus/saitek_osa/sparc.cpp
@@ -16,7 +16,7 @@ The module doesn't have its own LCD screen. It has a grill+fan underneath
at the front part, and a heatsink on the CPU.
TODO:
-- runs too slow? opening book moves take around 3 seconds, but on the real
+- runs too slow? opening book moves take around 2.5 seconds, but on the real
device less than 1 second
***************************************************************************/
diff --git a/src/devices/cpu/sparc/sparc.cpp b/src/devices/cpu/sparc/sparc.cpp
index 6e9ec39e90c..ea301d6a1fe 100644
--- a/src/devices/cpu/sparc/sparc.cpp
+++ b/src/devices/cpu/sparc/sparc.cpp
@@ -659,8 +659,8 @@ void mb86930_device::device_reset()
m_spmr = 0;
m_spmr_mask = ~0ULL;
std::fill_n(&m_wssr[0], 3, 0);
- m_last_masked_addr = 0ULL;
+ std::fill_n(&m_last_masked_addr[0], 6, 0ULL);
std::fill_n(&m_same_page_waits[0], 6, 0);
std::fill_n(&m_other_page_waits[0], 6, 0);
@@ -819,14 +819,14 @@ uint32_t mb86930_device::mmu_r(offs_t offset, uint32_t mem_mask)
{
const uint64_t full_addr = ((uint64_t)Asi << 30) | offset;
- const uint64_t masked_addr = full_addr & m_spmr_mask;
- const bool is_same_page = (masked_addr == m_last_masked_addr);
- m_last_masked_addr = masked_addr;
-
for (int cs = 0; cs < 6; cs++)
{
if ((full_addr & m_full_masks[cs]) == m_full_ranges[cs])
{
+ const uint64_t masked_addr = full_addr & m_spmr_mask;
+ const bool is_same_page = (masked_addr == m_last_masked_addr[cs]);
+ m_last_masked_addr[cs] = masked_addr;
+
eat_cycles(is_same_page ? m_same_page_waits[cs] : m_other_page_waits[cs]);
return m_cs_r[cs](offset, mem_mask);
}
@@ -839,14 +839,14 @@ template <uint8_t Asi> void mb86930_device::mmu_w(offs_t offset, uint32_t data,
{
const uint64_t full_addr = ((uint64_t)Asi << 30) | offset;
- const uint64_t masked_addr = full_addr & m_spmr_mask;
- const bool is_same_page = (masked_addr == m_last_masked_addr);
- m_last_masked_addr = masked_addr;
-
for (int cs = 0; cs < 6; cs++)
{
if ((full_addr & m_full_masks[cs]) == m_full_ranges[cs])
{
+ const uint64_t masked_addr = full_addr & m_spmr_mask;
+ const bool is_same_page = (masked_addr == m_last_masked_addr[cs]);
+ m_last_masked_addr[cs] = masked_addr;
+
eat_cycles(is_same_page ? m_same_page_waits[cs] : m_other_page_waits[cs]);
m_cs_w[cs](offset, data, mem_mask);
return;
diff --git a/src/devices/cpu/sparc/sparc.h b/src/devices/cpu/sparc/sparc.h
index 8f071a8c72b..a8f01a2452e 100644
--- a/src/devices/cpu/sparc/sparc.h
+++ b/src/devices/cpu/sparc/sparc.h
@@ -419,7 +419,7 @@ protected:
u32 m_amr[6];
u64 m_full_masks[6];
u64 m_full_ranges[6];
- u64 m_last_masked_addr;
+ u64 m_last_masked_addr[6];
int m_same_page_waits[6];
int m_other_page_waits[6];