dc4ee6ca91
make use of it where possible. This primarily brings in support for newer hardware, and FreeBSD is not yet able to support the abundance of IRQs on new hardware and many features in the Ethernet driver. Because of the changes to IRQs in the Simple Executive, we have to maintain our own list of Octeon IRQs now, which probably can be pared-down and be specific to the CIU interrupt unit soon, and when other interrupt mechanisms are added they can maintain their own definitions. Remove unmasking of interrupts from within the UART device now that the function used is no longer present in the Simple Executive. The unmasking seems to have been gratuitous as this is more properly handled by the buses above the UART device, and seems to work on that basis.
179 lines
5.7 KiB
ArmAsm
179 lines
5.7 KiB
ArmAsm
/***********************license start***************
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* Copyright (c) 2003-2010 Cavium Inc. (support@cavium.com). All rights
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* reserved.
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*
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* * Neither the name of Cavium Inc. nor the names of
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* its contributors may be used to endorse or promote products
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* derived from this software without specific prior written
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* permission.
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* This Software, including technical data, may be subject to U.S. export control
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* laws, including the U.S. Export Administration Act and its associated
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* regulations, and may be subject to export or import regulations in other
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* countries.
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* TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
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* AND WITH ALL FAULTS AND CAVIUM INC. MAKES NO PROMISES, REPRESENTATIONS OR
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* WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT TO
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* THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY REPRESENTATION OR
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* DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT DEFECTS, AND CAVIUM
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* SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES OF TITLE,
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* MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR PURPOSE, LACK OF
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* VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET POSSESSION OR
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* CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK ARISING OUT OF USE OR
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* PERFORMANCE OF THE SOFTWARE LIES WITH YOU.
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***********************license end**************************************/
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//
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// The function defined here is called for every function as it is executed.
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// These calls are automatically inserted by GCC when the switch "-pg" is
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// used. This allows cvmx-log to add a PC entry as each function is executed.
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// This information, along with the timestamps can give the user a good idea
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// of the performance characteristics of their program. This function normally
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// takes about 22 cycles to execute.
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//
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#ifdef __linux__
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#include <asm/asm.h>
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#include <asm/regdef.h>
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#define LA dla
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#else
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#include <machine/asm.h>
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#include <machine/regdef.h>
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#define LA la
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#endif
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.set noreorder
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.set noat
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LEAF(_mcount)
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//
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// All registers we use must be saved since calls are added by gcc
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// after register allocation. The at register ($3) will contain the
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// original ra register before the _mcount call. Also the compiler
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// automatically performs a "dsubu sp, sp, 16" before we're called.
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// At the end of this function all registers must have their original
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// values and the stack pointr must be adjusted by 16. This code is
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// pretty unreadable since it has been arranged to promote dual issue.
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//
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#ifdef __linux__
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dsubu sp, sp, 32
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#else
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dsubu sp, sp, 16
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#endif
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sd s3, 24(sp) // Save register
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rdhwr s3, $31 // Read the cycle count
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sd s0, 0(sp) // Save register
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LA s0, cvmx_log_buffer_end_ptr // Load the address of the end of the log buffer
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sd s1, 8(sp) // Save register
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LA s1, cvmx_log_buffer_write_ptr // Load the address of the location in the log buffer
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sd s2, 16(sp) // Save register
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ld s0, 0(s0) // Get value of the current log buffer end location
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ld s2, 0(s1) // Get value of the current log buffer location
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dsubu s0, s0, s2 // Subtract the end pointer and the write pointer
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sltiu s0, s0, 16 // Check if there are at least 16 bytes
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bne s0, $0, call_c_pc // Call the slow C function if we don't have room in the log
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li s0, 0x001 // 11 bit constant that matches the first 11 bits of a CVMX_LOG_TYPE_PC header
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sd ra, 8(s2) // Write the pc to the log
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dins s3, s0, 53, 11 // Overwrite the upper cycle count bits with the CVMX_LOG_TYPE_PC header
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sd s3, 0(s2) // Write the log header
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daddu s2, s2, 16 // Increment the write location ptr
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sd s2, 0(s1) // Store the write location ptr
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return_c_pc:
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ld s0, 0(sp) // Restore register
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ld s1, 8(sp) // Restore register
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ld s2, 16(sp) // Restore register
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ld s3, 24(sp) // Restore register
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daddu sp, sp, 32 // Pop everything off the stack, even the 16 bytes done by gcc
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jr ra // Return to the caller and
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or ra, $1, $1 // make sure the ra is back to its original value
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call_c_pc:
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// The registers used by the C code may change based on optimizations. To be
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// safe, I'll save all registers. We're in the slow path case anyway.
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dsubu sp, sp, 216
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sd $1, 0(sp)
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sd $2, 8(sp)
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sd $3, 16(sp)
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sd $4, 24(sp)
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sd $5, 32(sp)
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sd $6, 40(sp)
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sd $7, 48(sp)
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sd $8, 56(sp)
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sd $9, 64(sp)
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sd $10, 72(sp)
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sd $11, 80(sp)
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sd $12, 88(sp)
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sd $13, 96(sp)
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sd $14, 104(sp)
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sd $15, 112(sp)
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// s0, s1, s2, s3 are already saved
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sd $20, 120(sp)
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sd $21, 128(sp)
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sd $22, 136(sp)
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sd $23, 144(sp)
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sd $24, 152(sp)
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sd $25, 160(sp)
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sd $26, 168(sp)
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sd $27, 176(sp)
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sd $28, 184(sp)
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sd $29, 192(sp)
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sd $30, 200(sp)
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sd $31, 208(sp)
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or a0, ra, ra
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jal cvmx_log_pc
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nop
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ld $1, 0(sp)
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ld $2, 8(sp)
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ld $3, 16(sp)
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ld $4, 24(sp)
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ld $5, 32(sp)
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ld $6, 40(sp)
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ld $7, 48(sp)
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ld $8, 56(sp)
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ld $9, 64(sp)
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ld $10, 72(sp)
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ld $11, 80(sp)
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ld $12, 88(sp)
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ld $13, 96(sp)
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ld $14, 104(sp)
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ld $15, 112(sp)
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// s0, s1, s2, s3 will be restored later
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ld $20, 120(sp)
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ld $21, 128(sp)
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ld $22, 136(sp)
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ld $23, 144(sp)
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ld $24, 152(sp)
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ld $25, 160(sp)
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ld $26, 168(sp)
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ld $27, 176(sp)
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ld $28, 184(sp)
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ld $29, 192(sp)
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ld $30, 200(sp)
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ld $31, 208(sp)
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b return_c_pc
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daddu sp, sp, 216
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END(_mcount)
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