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[PULL 02/10] hw/hppa: Make number of TLB and BTLB entries configurable
From: |
Helge Deller |
Subject: |
[PULL 02/10] hw/hppa: Make number of TLB and BTLB entries configurable |
Date: |
Thu, 3 Sep 2020 18:07:38 +0200 |
Until now the TLB size was fixed at 256 entries. To allow operating
systems to utilize more TLB entries in the future, we need to tell
firmware how many TLB entries we actually support in the emulation.
Firmware then reports this to the operating system via the
PDC_CACHE_INFO call.
This patch simply does the preparation to allow more TLB entries.
Signed-off-by: Helge Deller <deller@gmx.de>
---
hw/hppa/machine.c | 8 ++++++++
target/hppa/cpu.h | 5 ++++-
2 files changed, 12 insertions(+), 1 deletion(-)
diff --git a/hw/hppa/machine.c b/hw/hppa/machine.c
index 90aeefe2a4..e9d84d0f03 100644
--- a/hw/hppa/machine.c
+++ b/hw/hppa/machine.c
@@ -72,6 +72,14 @@ static FWCfgState *create_fw_cfg(MachineState *ms)
fw_cfg_add_file(fw_cfg, "/etc/firmware-min-version",
g_memdup(&val, sizeof(val)), sizeof(val));
+ val = cpu_to_le64(HPPA_TLB_ENTRIES);
+ fw_cfg_add_file(fw_cfg, "/etc/cpu/tlb_entries",
+ g_memdup(&val, sizeof(val)), sizeof(val));
+
+ val = cpu_to_le64(HPPA_BTLB_ENTRIES);
+ fw_cfg_add_file(fw_cfg, "/etc/cpu/btlb_entries",
+ g_memdup(&val, sizeof(val)), sizeof(val));
+
return fw_cfg;
}
diff --git a/target/hppa/cpu.h b/target/hppa/cpu.h
index 801a4fb1ba..fb6c59d075 100644
--- a/target/hppa/cpu.h
+++ b/target/hppa/cpu.h
@@ -196,9 +196,12 @@ struct CPUHPPAState {
target_ureg shadow[7]; /* shadow registers */
/* ??? The number of entries isn't specified by the architecture. */
+#define HPPA_TLB_ENTRIES 256
+#define HPPA_BTLB_ENTRIES 0
+
/* ??? Implement a unified itlb/dtlb for the moment. */
/* ??? We should use a more intelligent data structure. */
- hppa_tlb_entry tlb[256];
+ hppa_tlb_entry tlb[HPPA_TLB_ENTRIES];
uint32_t tlb_last;
};
--
2.21.3
- [PULL 00/10] hppa power button support, graphics updates and firmware fixes, Helge Deller, 2020/09/03
- [PULL 04/10] hw/hppa: Change fw_cfg port address, Helge Deller, 2020/09/03
- [PULL 01/10] seabios-hppa: Update SeaBIOS to hppa-qemu-5.2-2 tag, Helge Deller, 2020/09/03
- [PULL 10/10] hw/display/artist: Allow screen size up to 2048 lines, Helge Deller, 2020/09/03
- [PULL 02/10] hw/hppa: Make number of TLB and BTLB entries configurable,
Helge Deller <=
- [PULL 05/10] hw/hppa: Tell SeaBIOS port address of fw_cfg, Helge Deller, 2020/09/03
- [PULL 08/10] hw/display/artist: Verify artist screen resolution, Helge Deller, 2020/09/03
- [PULL 09/10] hw/display/artist: Refactor x/y coordination extraction, Helge Deller, 2020/09/03
- [PULL 06/10] hw/hppa: Add power button emulation, Helge Deller, 2020/09/03
- [PULL 07/10] target/hppa: Fix boot with old Linux installation CDs, Helge Deller, 2020/09/03
- [PULL 03/10] hw/hppa: Store boot device in fw_cfg section, Helge Deller, 2020/09/03
- Re: [PULL 00/10] hppa power button support, graphics updates and firmware fixes, Peter Maydell, 2020/09/07
- Re: [PULL 00/10] hppa power button support, graphics updates and firmware fixes, Peter Maydell, 2020/09/08