forked from Imagelibrary/rtems
patch from Eric Norum <eric@cls.usask.ca> as follows:
At the request of kjoutwater@west.raytheon.com I'm submitting the following patch. c/src/lib/libbsp/m68k/gen68360/console/console.c Allow console baud rate to be set by debugger/downloader. c/src/lib/libbsp/m68k/gen68360/startup/init68360.c Add support for generic 68360 with static RAM.
This commit is contained in:
@@ -334,6 +334,130 @@ void _Init68360 (void)
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* Disable timers during FREEZE
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* Disable timers during FREEZE
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* Enable bus monitor during FREEZE
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* Enable bus monitor during FREEZE
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* BCLRO* arbitration level 3
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* BCLRO* arbitration level 3
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#elif (defined (GEN68360_WITH_SRAM))
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/*
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***************************************************
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* Generic Standalone Motorola 68360 *
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* As described in MC68360 User's Manual *
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* But uses SRAM instead of DRAM *
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* CS0* - 512kx8 flash memory *
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* CS1* - 512kx32 static RAM *
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***************************************************
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*/
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/*
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* Step 7: Deal with clock synthesizer
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* HARDWARE:
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* Change if you're not using an external oscillator which
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* oscillates at the system clock rate.
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*/
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m360.clkocr = 0x8F; /* No more writes, no clock outputs */
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m360.pllcr = 0xD000; /* PLL, no writes, no prescale,
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no LPSTOP slowdown, PLL X1 */
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m360.cdvcr = 0x8000; /* No more writes, no clock division */
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/*
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* Step 8: Initialize system protection
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* Enable watchdog
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* Watchdog causes system reset
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* Next-to-slowest watchdog timeout (21 seconds with 25 MHz oscillator)
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* Enable double bus fault monitor
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* Enable bus monitor for external cycles
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* 1024 clocks for external timeout
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*/
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m360.sypcr = 0xEC;
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/*
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* Step 9: Clear parameter RAM and reset communication processor module
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*/
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for (i = 0 ; i < 192 ; i += sizeof (long)) {
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*((long *)((char *)&m360 + 0xC00 + i)) = 0;
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*((long *)((char *)&m360 + 0xD00 + i)) = 0;
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*((long *)((char *)&m360 + 0xE00 + i)) = 0;
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*((long *)((char *)&m360 + 0xF00 + i)) = 0;
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}
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M360ExecuteRISC (M360_CR_RST);
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/*
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* Step 10: Write PEPAR
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* SINTOUT not used (CPU32+ mode)
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* CF1MODE=00 (CONFIG1 input)
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* IPIPE1*
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* WE0* - WE3*
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* OE* output
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* CAS2* - CAS3*
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* CAS0* - CAS1*
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* CS7*
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* AVEC*
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* HARDWARE:
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* Change if you are using a different memory configuration
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* (static RAM, external address multiplexing, etc).
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*/
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m360.pepar = 0x0080;
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/*
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* Step 11: Set up GMR
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*
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*/
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m360.gmr = 0x0;
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/*
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* Step 11a: Remap 512Kx8 flash memory on CS0*
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* 2 wait states
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* Make it read-only for now
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*/
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m360.memc[0].br = (unsigned long)&_RomBase | M360_MEMC_BR_WP |
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M360_MEMC_BR_V;
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m360.memc[0].or = M360_MEMC_OR_WAITS(2) | M360_MEMC_OR_512KB |
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M360_MEMC_OR_8BIT;
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/*
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* Step 12: Set up main memory
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* 512Kx32 SRAM on CS1*
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* 0 wait states
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*/
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m360.memc[1].br = (unsigned long)&_RamBase | M360_MEMC_BR_V;
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m360.memc[1].or = M360_MEMC_OR_WAITS(0) | M360_MEMC_OR_2MB |
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M360_MEMC_OR_32BIT;
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/*
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* Step 13: Copy the exception vector table to system RAM
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*/
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m68k_get_vbr (vbr);
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for (i = 0; i < 256; ++i)
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M68Kvec[i] = vbr[i];
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m68k_set_vbr (M68Kvec);
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/*
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* Step 14: More system initialization
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* SDCR (Serial DMA configuration register)
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* Enable SDMA during FREEZE
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* Give SDMA priority over all interrupt handlers
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* Set DMA arbiration level to 4
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* CICR (CPM interrupt configuration register):
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* SCC1 requests at SCCa position
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* SCC2 requests at SCCb position
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* SCC3 requests at SCCc position
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* SCC4 requests at SCCd position
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* Interrupt request level 4
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* Maintain original priority order
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* Vector base 128
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* SCCs priority grouped at top of table
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*/
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m360.sdcr = M360_SDMA_SISM_7 | M360_SDMA_SAID_4;
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m360.cicr = (3 << 22) | (2 << 20) | (1 << 18) | (0 << 16) |
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(4 << 13) | (0x1F << 8) | (128);
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/*
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* Step 15: Set module configuration register
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* Disable timers during FREEZE
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* Enable bus monitor during FREEZE
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* BCLRO* arbitration level 3
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* No show cycles
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* User/supervisor access
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* Bus clear interrupt service level 7
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* SIM60 interrupt sources higher priority than CPM
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*/
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m360.mcr = 0x4C7F;
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* No show cycles
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* No show cycles
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* User/supervisor access
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* User/supervisor access
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* Bus clear interrupt service level 7
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* Bus clear interrupt service level 7
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