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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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CRIS v32: Update boot/compressed/misc.c
- Shorten include paths to machine specific headers. - Remove fill_inbuf, not defined here. - Return __dest as value from memcpy. - Enable serial port hardware transmitter and receiver in serial_setup. - Correct baudrate divisor calculation, changed from 4800 to 115200. - Add support for Artpec-3 specific serial port setup. - Initialize pinmux for the correct serial port.
This commit is contained in:
Jesper Nilsson
parent
247c3c959f
commit
a5d204bf36
@ -1,8 +1,6 @@
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/*
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* misc.c
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*
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* $Id: misc.c,v 1.8 2005/04/24 18:34:29 starvik Exp $
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*
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* This is a collection of several routines from gzip-1.0.3
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* adapted for Linux.
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*
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@ -22,9 +20,13 @@
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#include <linux/types.h>
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#include <asm/arch/hwregs/reg_rdwr.h>
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#include <asm/arch/hwregs/reg_map.h>
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#include <asm/arch/hwregs/ser_defs.h>
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#include <hwregs/reg_rdwr.h>
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#include <hwregs/reg_map.h>
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#include <hwregs/ser_defs.h>
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#include <hwregs/pinmux_defs.h>
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#ifdef CONFIG_CRIS_MACH_ARTPEC3
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#include <hwregs/clkgen_defs.h>
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#endif
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/*
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* gzip declarations
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@ -85,7 +87,6 @@ static unsigned outcnt = 0; /* bytes in output buffer */
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# define Tracecv(c,x)
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#endif
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static int fill_inbuf(void);
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static void flush_window(void);
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static void error(char *m);
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static void gzip_mark(void **);
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@ -186,6 +187,8 @@ memset(void* s, int c, size_t n)
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char *ss = (char*)s;
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for (i=0;i<n;i++) ss[i] = c;
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return s;
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}
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void*
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@ -196,6 +199,8 @@ memcpy(void* __dest, __const void* __src,
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char *d = (char *)__dest, *s = (char *)__src;
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for (i=0;i<__n;i++) d[i] = s[i];
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return __dest;
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}
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/* ===========================================================================
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@ -225,15 +230,15 @@ flush_window()
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static void
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error(char *x)
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{
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puts("\n\n");
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puts("\r\n\n");
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puts(x);
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puts("\n\n -- System halted\n");
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puts("\r\n\n -- System halted\n");
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while(1); /* Halt */
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}
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void
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setup_normal_output_buffer()
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setup_normal_output_buffer(void)
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{
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output_data = (char *)KERNEL_LOAD_ADR;
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}
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@ -262,15 +267,17 @@ serial_setup(reg_scope_instances regi_ser)
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rec_baud = REG_RD(ser, regi_ser, rw_rec_baud_div);
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tr_ctrl.stop_bits = 1; /* 2 stop bits. */
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tr_ctrl.en = 1; /* enable transmitter */
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rec_ctrl.en = 1; /* enabler receiver */
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/*
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* The baudrate setup is a bit fishy, but in the end the transceiver is
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* set to 4800 and the receiver to 115200. The magic value is
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* 29.493 MHz.
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* The baudrate setup used to be a bit fishy, but now transmitter and
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* receiver are both set to the intended baud rate, 115200.
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* The magic value is 29.493 MHz.
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*/
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tr_ctrl.base_freq = regk_ser_f29_493;
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rec_ctrl.base_freq = regk_ser_f29_493;
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tr_baud.div = (29493000 / 8) / 4800;
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tr_baud.div = (29493000 / 8) / 115200;
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rec_baud.div = (29493000 / 8) / 115200;
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REG_WR(ser, regi_ser, rw_tr_ctrl, tr_ctrl);
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@ -280,25 +287,52 @@ serial_setup(reg_scope_instances regi_ser)
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}
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void
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decompress_kernel()
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decompress_kernel(void)
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{
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char revision;
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/* input_data is set in head.S */
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inbuf = input_data;
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#if defined(CONFIG_ETRAX_DEBUG_PORT1) || \
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defined(CONFIG_ETRAX_DEBUG_PORT2) || \
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defined(CONFIG_ETRAX_DEBUG_PORT3)
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reg_pinmux_rw_hwprot hwprot;
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#ifdef CONFIG_CRIS_MACH_ARTPEC3
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reg_clkgen_rw_clk_ctrl clk_ctrl;
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/* Enable corresponding clock region when serial 1..3 selected */
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clk_ctrl = REG_RD(clkgen, regi_clkgen, rw_clk_ctrl);
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clk_ctrl.sser_ser_dma6_7 = regk_clkgen_yes;
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REG_WR(clkgen, regi_clkgen, rw_clk_ctrl, clk_ctrl);
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#endif
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/* pinmux setup for ports 1..3 */
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hwprot = REG_RD(pinmux, regi_pinmux, rw_hwprot);
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#endif
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#ifdef CONFIG_ETRAX_DEBUG_PORT0
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serial_setup(regi_ser0);
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#endif
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#ifdef CONFIG_ETRAX_DEBUG_PORT1
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hwprot.ser1 = regk_pinmux_yes;
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serial_setup(regi_ser1);
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#endif
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#ifdef CONFIG_ETRAX_DEBUG_PORT2
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hwprot.ser2 = regk_pinmux_yes;
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serial_setup(regi_ser2);
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#endif
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#ifdef CONFIG_ETRAX_DEBUG_PORT3
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hwprot.ser3 = regk_pinmux_yes;
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serial_setup(regi_ser3);
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#endif
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#if defined(CONFIG_ETRAX_DEBUG_PORT1) || \
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defined(CONFIG_ETRAX_DEBUG_PORT2) || \
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defined(CONFIG_ETRAX_DEBUG_PORT3)
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REG_WR(pinmux, regi_pinmux, rw_hwprot, hwprot);
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#endif
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/* input_data is set in head.S */
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inbuf = input_data;
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setup_normal_output_buffer();
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@ -307,11 +341,11 @@ decompress_kernel()
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__asm__ volatile ("move $vr,%0" : "=rm" (revision));
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if (revision < 32)
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{
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puts("You need an ETRAX FS to run Linux 2.6/crisv32.\n");
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puts("You need an ETRAX FS to run Linux 2.6/crisv32.\r\n");
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while(1);
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}
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puts("Uncompressing Linux...\n");
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puts("Uncompressing Linux...\r\n");
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gunzip();
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puts("Done. Now booting the kernel.\n");
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puts("Done. Now booting the kernel.\r\n");
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}
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