diff options
| author |   Helge Deller <deller@gmx.de> | 2019-04-07 01:09:23 +0200 |
|---|---|---|
| committer | Helge Deller <deller@gmx.de> | 2019-05-03 23:47:39 +0200 |
| commit | 82d96bf68e6c2101dfbba2984cd9565643f5d8cb (patch) | |
| tree | 4334e5f50d7a9bec606f298245326343d8b6cbec /arch/parisc/boot | |
| parent | parisc: Skip registering LED when running in QEMU (diff) | |
| download | linux-dev-82d96bf68e6c2101dfbba2984cd9565643f5d8cb.tar.xz linux-dev-82d96bf68e6c2101dfbba2984cd9565643f5d8cb.zip | |
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>
Diffstat (limited to 'arch/parisc/boot')
| -rw-r--r-- | arch/parisc/boot/compressed/misc.c | 31 |
1 files changed, 20 insertions, 11 deletions
diff --git a/arch/parisc/boot/compressed/misc.c b/arch/parisc/boot/compressed/misc.c index 2556bb181813..2d395998f524 100644 --- a/arch/parisc/boot/compressed/misc.c +++ b/arch/parisc/boot/compressed/misc.c @@ -145,14 +145,13 @@ static int putchar(int c) void __noreturn error(char *x) { - puts("\n\n"); - puts(x); - puts("\n\n -- System halted"); + if (x) puts(x); + puts("\n -- System halted\n"); while (1) /* wait forever */ ; } -static int print_hex(unsigned long num) +static int print_num(unsigned long num, int base) { const char hex[] = "0123456789abcdef"; char str[40]; @@ -160,12 +159,14 @@ static int print_hex(unsigned long num) str[i--] = '\0'; do { - str[i--] = hex[num & 0x0f]; - num >>= 4; + str[i--] = hex[num % base]; + num = num / base; } while (num); - str[i--] = 'x'; - str[i] = '0'; + if (base == 16) { + str[i--] = 'x'; + str[i] = '0'; + } else i++; puts(&str[i]); return 0; @@ -187,8 +188,9 @@ put: if (fmt[++i] == '%') goto put; + print_num(va_arg(args, unsigned long), + fmt[i] == 'x' ? 16:10); ++i; - print_hex(va_arg(args, unsigned long)); } va_end(args); @@ -327,8 +329,15 @@ unsigned long decompress_kernel(unsigned int started_wide, free_mem_end_ptr = rd_start; #endif - if (free_mem_ptr >= free_mem_end_ptr) - error("Kernel too big for machine."); + if (free_mem_ptr >= free_mem_end_ptr) { + int free_ram; + free_ram = (free_mem_ptr >> 20) + 1; + if (free_ram < 32) + free_ram = 32; + printf("\nKernel requires at least %d MB RAM.\n", + free_ram); + error(NULL); + } #ifdef DEBUG printf("\n"); |