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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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parisc: PA-Linux requires at least 32 MB RAM
Even a 32-bit kernel requires at least 27 MB to decompress itself, so halt the system with a message if the system has less memory than 32 MB. Signed-off-by: Helge Deller <deller@gmx.de>
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@ -145,14 +145,13 @@ static int putchar(int c)
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void __noreturn error(char *x)
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{
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puts("\n\n");
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puts(x);
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puts("\n\n -- System halted");
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if (x) puts(x);
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puts("\n -- System halted\n");
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while (1) /* wait forever */
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;
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}
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static int print_hex(unsigned long num)
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static int print_num(unsigned long num, int base)
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{
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const char hex[] = "0123456789abcdef";
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char str[40];
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@ -160,12 +159,14 @@ static int print_hex(unsigned long num)
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str[i--] = '\0';
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do {
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str[i--] = hex[num & 0x0f];
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num >>= 4;
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str[i--] = hex[num % base];
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num = num / base;
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} while (num);
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str[i--] = 'x';
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str[i] = '0';
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if (base == 16) {
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str[i--] = 'x';
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str[i] = '0';
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} else i++;
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puts(&str[i]);
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return 0;
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@ -187,8 +188,9 @@ int printf(const char *fmt, ...)
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if (fmt[++i] == '%')
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goto put;
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print_num(va_arg(args, unsigned long),
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fmt[i] == 'x' ? 16:10);
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++i;
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print_hex(va_arg(args, unsigned long));
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}
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va_end(args);
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@ -327,8 +329,15 @@ unsigned long decompress_kernel(unsigned int started_wide,
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free_mem_end_ptr = rd_start;
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#endif
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if (free_mem_ptr >= free_mem_end_ptr)
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error("Kernel too big for machine.");
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if (free_mem_ptr >= free_mem_end_ptr) {
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int free_ram;
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free_ram = (free_mem_ptr >> 20) + 1;
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if (free_ram < 32)
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free_ram = 32;
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printf("\nKernel requires at least %d MB RAM.\n",
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free_ram);
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error(NULL);
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}
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#ifdef DEBUG
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printf("\n");
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