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release-notes.md
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release-notes.md
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@ -6,63 +6,63 @@ This is a bug-fix and performance-improvement release. No new functionality
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is added to the SweRV core.
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is added to the SweRV core.
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## Bug fixes:
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1. Bug fixes:
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1. Hart incorrectly cleared dmcontrol.dmactive on reset (reported by
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* Hart incorrectly cleared dmcontrol.dmactive on reset (reported by
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Codasip).
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Codasip).
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2. Hart never asserted the dmstatus.allrunning signal on reset which
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* Hart never asserted the dmstatus.allrunning signal on reset which
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caused a timeout in OpenOCD (reported by Codasip).
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caused a timeout in OpenOCD (reported by Codasip).
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3. Debug module failed to auto-increment register on system-bus access
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* Debug module failed to auto-increment register on system-bus access
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of size 64-bit (reported by Codasip).
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of size 64-bit (reported by Codasip).
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4. The core_rst_n signal was incorrectly connected (reported by Codasip).
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* The core_rst_n signal was incorrectly connected (reported by Codasip).
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5. Moudule/instance renamed for tool compatibility.
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* Moudule/instance renamed for tool compatibility.
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6. The program counter was getting corrupted when the load/store unit
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* The program counter was getting corrupted when the load/store unit
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indicated both a single-bit and a double-bit error in the same
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indicated both a single-bit and a double-bit error in the same
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cycle.
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cycle.
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7. The MSTATUS control register was not being updated as expected when
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* The MSTATUS control register was not being updated as expected when
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both a non-maskable-interrupt and an MSTATUS-write happened in the
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both a non-maskable-interrupt and an MSTATUS-write happened in the
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same cycle.
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same cycle.
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8. Write to SBDATA0 was not starting an system-bus write access when
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* Write to SBDATA0 was not starting an system-bus write access when
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sbreadonaddr/sbreadondata is set.
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sbreadonaddr/sbreadondata is set.
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9. Minstret was incorrectly counting ecall/ebreak instructions
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* Minstret was incorrectly counting ecall/ebreak instructions
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10. The dec_tlu_mpc_halted_only signal was not set for MPC halt after
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* The dec_tlu_mpc_halted_only signal was not set for MPC halt after
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reset.
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reset.
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11. The MEPC control register was not being updated when a
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* The MEPC control register was not being updated when a
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firmware-halt request was followed by a timer interrupt.
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firmware-halt request was followed by a timer interrupt.
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12. The MINSTRETH control register was being incremented when
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* The MINSTRETH control register was being incremented when
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performance counters were disabled.
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performance counters were disabled.
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13. Bus driver contained combinational logic from multiple clock
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* Bus driver contained combinational logic from multiple clock
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domains that sometimes caused a glitch.
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domains that sometimes caused a glitch.
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14. System bus reads were always being made with 64-bit size for the
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* System bus reads were always being made with 64-bit size for the
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AXI bus which is incorrect for IO access.
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AXI bus which is incorrect for IO access.
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15. DCCM single bit errors were counted for instruction that did not
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* DCCM single bit errors were counted for instruction that did not
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commit.
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commit.
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16. ICCM Single Bit Errors were double counted.
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* ICCM Single Bit Errors were double counted.
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17. Load/store unit was not detecting access faults when DCCM and PIC
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* Load/store unit was not detecting access faults when DCCM and PIC
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memories are next to each other.
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memories are next to each other.
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18. Single bit ECC errors on data load were not always corrected in
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* Single bit ECC errors on data load were not always corrected in
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the DCCM.
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the DCCM.
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19. ECC single bit error were not always corrected in the DCCM for DMA
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* ECC single bit error were not always corrected in the DCCM for DMA
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access.
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access.
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20. Single bit Errors detected while reading ICCM through DMA were not
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* Single bit Errors detected while reading ICCM through DMA were not
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being corrected in memory.
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being corrected in memory.
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## Improvements:
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2. Improvements:
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1. Improved performance by removing redundant term in decode stall
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* Improved performance by removing redundant term in decode stall
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logic.
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logic.
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2. Reduced power used by the ICCM memory arrays.
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* Reduced power used by the ICCM memory arrays.
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## Testbench Improvements:
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3. Testbench Improvements:
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1. AXI4 and AHB-Lite support.
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* AXI4 and AHB-Lite support.
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2. Updated bus memory to be persistent and handle larger programs.
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* Updated bus memory to be persistent and handle larger programs.
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3. Makefile supports ability to run with source or pre-generated hex
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* Makefile supports ability to run with source or pre-generated hex
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files.
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files.
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4. Makefile supports targets for coremarks benchmark (issue #25).
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* Makefile supports targets for coremarks benchmark (issue #25).
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5. Questa support in Makefile (Issue #19).
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* Questa support in Makefile (Issue #19).
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