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parisc: PA-Linux requires at least 32 MB RAM

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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>
This commit is contained in:
Helge Deller 2019-04-07 01:09:23 +02:00
parent b438749044
commit 82d96bf68e
1 changed files with 20 additions and 11 deletions
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31
arch/parisc/boot/compressed/misc.c
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@ -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");